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FAA
Federal Aviation Administration Department of Transportation
Aviation Safety
AIRWORTHINESS DIRECTIVE
Generated by Aircraft-logs.com — March 26, 2026

AD 2005-26-09 SUPERSEDED

1st stage fan blades.
WARNING: This AD has been superseded and is no longer active. Replaced by: 2007-18-06. Refer to the superseding AD(s) for current requirements.
Key Information
AD Number 2005-26-09 Status Superseded
Effective Date January 11, 2006 Issue Date December 16, 2005
Docket Number FAA-2005-23072 Amendment 39-14430
Product Type ["Engine"] Product Subtype Not specified
CFR Part --- - Part 39 CFR Section N/A
Citation Federal Register: December 27, 2005 (Volume 70, Number 247)
Applicability
Manufacturer(s) Pratt & Whitney Division
Model(s) JT9D-7R4D JT9D-7R4D1 JT9D-7R4E JT9D-7R4E1 JT9D-7R4E4 JT9D-7R4G2 JT9D-7R4H1
Related Airworthiness Directives
Superseded By 2007-18-06
Summary

The FAA is adopting a new airworthiness directive (AD) for Pratt & Whitney (PW) JT9D-7R4 turbofan engines. This AD requires inspection of the blade root thickness of 1st stage fan blades identified by part number (P/N) and serial number (SN) in this AD, by a repair station approved by PW to perform the inspection. This AD results from a report that a repair station created their own repair and performed it on 520 1st stage fan blades, without approval from PW. We are issuing this AD to prevent 1st stage fan blade fracture and uncontained engine failure, resulting in possible damage to the airplane.

Action Required

Final rule; request for comments.

Regulatory Text

2005-26-09 Pratt & Whitney: Amendment 39-14430. Docket No. FAA-2005- 23072; Directorate Identifier 2005-NE-38-AD.

Effective Date

(a) This airworthiness directive (AD) becomes effective January 11, 2006.

Affected ADs

(b) None.

Applicability

(c) This AD applies to Pratt & Whitney (PW) JT9D-7R4 turbofan engines. These engines are installed on, but not limited to, Airbus A300 and A310, and Boeing 747and 767 airplanes.

Unsafe Condition

(d) This AD results from a report that a repair station created their own repair and performed it on 520 1st stage fan blades, without approval from PW. We are issuing this AD to prevent 1st stage fan blade fracture and uncontained engine failure, resulting in possible damage to the airplane.

Compliance

(e) You are responsible for having the actions required by this AD performed within the compliance times specified unless the actions have already been done.

(f) Before installing the 1st stage fan blades thatare listed by part number and serial number in Table 1 of this AD, or if already installed, at the next 1st stage fan blade exposure, do the following:

Table 1.--Affected 1st Stage Fan Blades

Part number
Serial no.

Part number
Serial no.

Part number
Serial no.
5001341 022
JW2804

831021 003
NS8584

5001341 022
ND6555
5001341 022
JW0354

831021 003
NN7272

5001341 022
M1375
5001341 022
ND5746

831021 003
MG7159

5001341 022
MG6627
5001341 022
ND5770

831021 003
NS6592

5001341 022
MG6794
5001341 022
JW3992

831021 003
ND7862

5001341 022
ND9399
5001341 022
ND8615

831021 003
ND6684

5001341 022
NE0084
5001341 022
JW0442

831021 003
NN7744

5001341 022
MG6252
5001341 022
JW2317

831021 003
ND7480

5001341 022
ND7422
5001341 022
ND8631

831021 003
ND7873

5001341 022
ND7043
5001341 022
ND8635

831021 003
ND6827

5001341 022
MG57225001341 022
JW4624

831021 003
ND6576

5001341 022
MG5918
5001341 022
NE0394

831021 003
ND9261

5001341 022
ND6984
5001341 022
NE0153

831021 003
NS8686

5001341 022
M0839
5001341 022
NN8054

831021 003
ND9052

5001341 022
M0922
5001341 022
JW4693

831021 003
ND6897

5001341 022
M0938
5001341 022
ND7304

831021 003
ND6565

5001341 022
M1117
5001341 022
MG6108

831021 003
NN8966

5001341 022
M0307
5001341 022
MG5862

831021 003
PX3707

5001341 022
JW3871
5001341 022
MG5619

831021 003
NS7031

5001341 022
M1125
5001341 022
NE0308

831021 003
ND6584

5001341 022
M1149
5001341 022
NE0200

831021 003
ND9883

5001341 022
JW2681
5001341 022
MG6797

831021 003
NS6535

5001341 022
M0270
5001341 022
JW0230

831021 003
ND7852

5001341 022
M1120
5001341 022
ND5652

831021 003
ND9662

5001341 022
M0205
5001341 022
ND5775

831021 003
ND7871

5001341 022
AE9352
5001341 022
JW0251

831021 003
JW0106

5001341 022
JW3492
5001341 022
ND5719

831021 003
ND8305

5001341 022
ND6148
5001341 022
JW0248

831021 003
NS6409

5001341 022
ND8907
5001341 022
ND5785

831021 003
NE0442

5001341 022
M1235
5001341 022
ND5676

831021 003
ND9095

5001341 022
MG5585
5001341 022
ND5661

831021 003
ND9302

5001341 022
ND8436
5001341 022
JW0265

831021 003
ND9023

5001341 022
MG5696
5001341 022
ND5699

831021 003
ND8009

5001341 022
ND8704
5001341 022
ND5767

831021 003
ND8477

5001341 022
JW2284
5001341 022
JW0259

831021 003
ND7492

5001341 023
JW2313
5001341 022
ND5680

831021 003
ND8776

5001341 024
JW2498
5001341 022
ND5749

831021 003
ND6524

5001341 025
JW2541
5001341 022
JW0235

831021 003
ND6704

5001341 026
JW2560
5001341 022
ND5776

831021 003
ND8911

5001341 027
JW2589
5001341 022
ND8580

831021 003
ND8789

5001341 028
JW2639
5001341 022
MG6039

831021 003
ND8798

5001341 029
JW2760
5001341 022
ND9127

831021 003
ND6407

5001341 030
JW2792
5001341 022
JW4287

831021 003
ND7668

5001341 031
M0579
5001341 022
JW0262

831021 003
ND9179

5001341 032
MG2825
5001341 022
JW0445

831021 003
NE0421

5001341 033
MG5477
5001341 022
JW4665

831021 003
ND6513

5001341 034
ND5917
5001341 022
MG5901

831021 003
ND6744

5001341 022
JW1976
5001341 022
NE0303

831021 003
ND7654

5001341 022
JW2653
5001341 022
ND8703

831021 003
ND7870

5001341 022
JW2608
5001341 022
JW4574

831021 003
ND9759

5001341 022
JW2727
5001341 022
JW4286

831021 003
ND6561

5001341 022
JW2764
5001341 022
JW4491

831021 003
ND5826

5001341 022
JW2265
5001341 022
JW4630831021 003
ND6031

5001341 022
JW2474
5001341 022
JW4391

831021 003
ND8714

5001341 022
JW2396
5001341 022
MG6550

831021 003
ND8872

5001341 022
JW3554
5001341 022
MG6776

831021 003
ND6678

5001341 022
JW2667
5001341 022
JW4586

831021 003
ND6629

5001341 022
MG2302
5001341 022
JW0352

831021 003
ND8995

5001341 022
MG3972
5001341 022
JW4261

831021 003
NE0302

5001341 022
JW3930
5001341 022
MG6135

831021 003
ND6405

5001341 022
ND6749
5001341 022
JW4685

831021 003
NS8300

5001341 022
M1172
5001341 022
MG6772

831021 003
NS8769

5001341 022
JW2104
5001341 022
MG6793

831021 003
NS7147

5001341 022
JW2519
5001341 022
MG7111

831021 003
ND6649

5001341 022
JW2640
5001341 022
ND8618

831021 003
ND7766

5001341 022
JW2517
5001341 022
JW0644

831021 003
NS7864

5001341 022
JW2663
5001341 022
JW4631

831021 003
NS8734

5001341 022
JW2823
5001341 022
JW4651

831021 003
ND6677

5001341 022
M0536
5001341 022
JW0234

831021 003
NS7911

5001341 022
JW2725
5001341 022
JW4646

831021 003
ND8205

5001341 022
MG5917
804121
NN9016

831021 003
ND8804

5001341 022
JW0681
804121
VJ3393

831021 003
ND6639

5001341 022
JW0711
804121
PX3694

831021 003
ND8994

5001341 022
JW0740
804121
RK9168

831021 003
ND7275

5001341 022
JW0807
804121
PX5023

831021 003
ND9195

5001341 022
JW1089
804121
VJ3324

831021 003
ND6178

5001341 022
JW1362
804121
VJ3504

831021 003
ND8639

5001341 022
JW2065
804121
NN9115

831021 003
ND9760

5001341 022
MG2434
804121
NN8936

831021 003
ND9108X

5001341 022
MG2846
804121
PX3816

831021 003
ND6427

5001341 022
JW0806
804121
VJ3412

831021 003
ND6590

804121
NN9854
804121
RK9163

831021 003
NS6551

804121
NN9024
804121
VJ3447

831021 003
JW1158

804121
NN9032
804121
RK9230

831021 003
ND6412

804121
PX5029
804121
RK9109

831021 003
ND7922

804121
NN9050
804121
PX4627

831021 003
NS8678

804121
NS8242
804121
RK8990

831021 003
ND8930

804121
NS8260
804121
SP9459

831021 003
ND6596

804121
PX4273
804121
RK8656

831021 003
ND9570

804121
PX4378
804121
NN8933

831021 003
NN9027

804121
RL0857
804121
VJ3444

831021 003
ND6446

804121
RX8763
804121
ND5864

831021 003
NE0275

804121
NS8331
804121
NN9020

831021 003
ND9917

804121
NN9824
804121
RK8905

831021 003
NS7919

804121
MG6979
804121
SR1733

831021 003
NS7907

804121
MG7023
804121
NN9047

831021 003
ND6583

804121
MG7055
804121
PX3692

831021 003
NN7420

804121
RK8914
804121
PX3786

831021 003
ND7746

804121
RL0023
804121
NN9025

831021 003
ND8187

804121
PX4328
804121
NN9007

831021 003
NN8999

804121
RK9008
804121
RK9100

831021 003
ND6043

804121
TG1506
804121
VJ3399

831021 003
ND7880

804121
KK8226
804121
PX4970

831021 003
NN7175

804121
MG2604
804121
PX5013

831021 003
ND9816

804121
NS6691
804121
RK8904

831021 003
ND8174

804121
RK8968
804121
NN8986

831021 003
ND6045

804121
NN9917
804121
NN8829

831021 003
NS7562

804121
RK7824
804121
VJ3459

831021 003
JW0075

804121
M1343
804121
RK9143

831021 003
ND6848

804121
NS6559
804121
VJ3414

831021 003
ND8531

804121
NS7767
804121
NN9028

831021 003
ND6311

804121
NE0363
804121
SP1557

831021 003
ND8144

804121
PX3771
804121
PX5003

831021 003
ND5798

804121
NN9972
804121
PX5042

831021 003
ND8113

804121
RL0460
804121
VJ3475

831021 003
ND9642

804121
RK8310
804121
ND7330

831021 003
ND7436

804121
SR2115
804121
PX3714

831021 003
ND9054

804121
TG2826
831021 003
NS8913

831021 003
ND9683

804121
PX5018
831021 003
ND6512

831021 003
ND5991

804121
PX5002
831021 003
ND6941

831021 003
ND6026

831021 003
ND7627
831021 003
ND9576

831021 003
ND6616

831021 003
ND6890
831021 003
NS7555

831021 003
ND6530

831021 003
ND7461
831021 003
NS8286

831021 003
NE0374

831021 003
ND9616
831021 003
NS7447

831021 003
ND6364

831021 003
NE0413
831021 003
ND6488

831021 003
ND7718

831021 003
NS8825
831021 003
ND8296

831021 003
ND6473

831021 003
NS6350
831021 003
ND6956

831021 003
ND6436

831021 003
NS7168
831021 003
ND7879

831021 003
ND6887

831021 003
NS7705
831021 003
ND6509

831021 003
ND6518

831021 003
NS7848
831021 003
ND9814

831021 003
ND6479

831021 003
ND9128
831021 003
NN7331

831021 003
NS6330

831021 003
ND9541
831021 003
ND6991

831021 003
ND7264

831021 003
ND9671
831021 003
ND6894

831021 003
ND8151

831021 003
ND9684
831021 003
NS6413

831021 003
ND6562

831021 003
NE0277
831021 003
ND7344

831021 003
NS8776

831021 003
NE0384
831021 003
ND6947

831021 003
ND6519

831021 003
NE0396
831021 003
NN8732

831021 003
ND7659

831021 003
ND6421
831021 003
ND8536

831021 003
NS9049

831021 003
ND6599
831021 003
ND6946

831021 003
NS6861

831021 003
ND6614
831021 003
ND6723

831021 003
ND9571

831021 003
ND7847
831021 003
ND9294

831021 003
ND9346

831021 003
ND8346
831021 003
ND9290

831021 003
ND6501

831021 003
ND8853
831021 003
ND6013

831021 003
NS8505

831021 003
ND8915
831021 003
ND8937

831021 003
ND9338

831021 003
NS8719
831021 003
NS7160

831021 003
ND9775

831021 003
NS8838
831021 003
NS6435

831021 003
ND6485

831021 003
NT0169
831021 003
NS6591

831021 003
ND7165

831021 003
NS9584
831021 003
ND9558

831021 003
ND9371

831021 003
ND6445
831021 003
NS8479

831021 003
ND9537

831021 003
ND6834
831021 003
NS9382

831021 003
NS7889

831021 003
ND7467
831021 003
ND8965

831021 003
ND7877

831021 003
ND8887
831021 003
ND9837

831021 003
ND8670

831021 003
ND6520
831021 003
ND5959

831021 003
ND9032

831021 003
NS8611
831021 003
NS6491

831021 003
ND8781

831021 003
NS7640
831021 003
NS9072

831021 003
ND8604

831021 003
NN7037
831021 003
ND9625

831021 003
ND9329

831021 003
NN7590
831021 003
ND6714

831021 003
ND9110

831021 003
NN8120
831021 003
ND6820

831021 003
ND5997

831021 003
NN8573
831021 003
ND8972

831021 003
ND6027

831021 003
NN9719
831021 003
NE0286

831021 003
ND9589

831021 003
NS8784
831021 003
NE0347

831021 003
ND6575

831021 003
TB6B367
831021 003
ND8010

831021 003
ND6592

831021 003
NN9557
831021 003
ND8956

831021 003
ND6463

831021 003
NN9710
831021 003
ND9535

831021 003
NS8583

831021 003
NS8374
831021 003
ND9831

831021 003
NS8590

831021 003
NS8770
831021 003
NE0227

831021 003
NS8567

831021 003
NS9022
831021 003
ND8283

831021 003
NS6795

831021 003
NS8416
831021 003
ND9730

831021 003
NS7110

831021 003
NS6474
831021 003
NN7656

831021 003
NS6587

831021 003
ND8912
831021 003
NS7775

831021 003
NS6404

831021 003
NT0108
831021 003
ND9815

831021 003
ND6486

831021 003
NS8836
831021 003
ND6135

5001341 022
JW0942

831021 003
NN8310
831021 003NS8491

5001341 022
ND9231

831021 003
NS6395

5001341 022
JW4812

(1) Check the 1st stage fan blade for a circled, letter I, on the approved marking area of the outboard side of the blade platform. If the blade has this marking, no further action is required.

(2) Remove 1st stage fan blades without a circled, letter I, on the approved marking area of the outboard side of the blade platform, if installed.

(3) Send 1st stage fan blades to a source-substantiation- approved repair station, approved by PW, for inspection of the blade root thickness. You can find information on inspecting the blade root thickness in Engine Manual Section 72-31-02, Inspect--01, and Repair--23.

(g) For 1st stage fan blades that pass the inspection referenced in paragraph (f) of this AD:

(1) Vibropeen the letter I and a circle around that letter, on the approved marking area of the outboard side of the blade platform. You can find information on approved blade marking in the JT9D-7R4 Engine Manual, Section 72-31-02, Typical Repair--13, Mark Repair Codes.

(2) Return the 1st stage fan blades to service.

Alternative Methods of Compliance

(h) The Manager, Engine Certification Office, has the authority to approve alternative methods of compliance for this AD if requested using the procedures found in 14 CFR 39.19.

Related Information

(i) None.

Supplementary Information

In May 2005, we received a report from Airfoil Technologies International (ATI), of the United Kingdom, that their repair station created their own repair and performed it on 520 1st stage fan blades, without approval from PW. The repairs were made to a critical area of the fan blade root. PW requires source demonstration by each repair station before they approve the repair station to perform blade repairs, including the repair that should have been performed to these 1st stage fan blades, known as Repair-23. This requirement exists due to PW's concern with proper blending in a critical area of the blade root. This condition, if not corrected, could result in 1st stage fan blade fracture and uncontained engine failure, resulting in possible damage to the airplane.

FAA's Determination and Requirements of this AD

The unsafe condition described previously is likely to exist or develop on other PW JT9D-7R4 turbofan engines of the same type design. For that reason, we are issuing this AD to prevent 1st stage fan blade fracture and uncontained engine failure, resulting in possible damage to the airplane. This AD requires, before installing the 1st stage fan blades that are listed by P/N and SN in Table 1 of this AD, or if already installed, at the next 1st stage fan blade exposure:

Checking the 1st stage fan blade for a circled, letter I, on the approved marking area of the outboard side of the blade platform. If the blade has this marking, no further action is required.

Removing 1st stage fan blades without a circled, letter I, on the approved marking area of the outboard side of the blade platform if installed; and

Sending 1st stage fan blades to a source-substantiation- approved repair station, approved by PW, for inspection of the blade root thickness; and

Returning to service 1st stage fan blades that pass the inspection, after properly marking the blade.

FAA's Determination of the Effective Date

Since an unsafe condition exists that requires the immediate adoption of this AD, we have found that notice and opportunity for public comment before issuing this AD are impracticable, and that good cause exists for making this amendment effective in less than 30 days.

Comments Invited

This AD is a final rule that involves requirements affecting flight safety and was not preceded by notice and an opportunity for public comment; however, we invite you to send us any written relevant data, views, or arguments regarding this AD. Send your comments to an address listed under ADDRESSES. Include "AD Docket No. FAA-2005-23072; Directorate Identifier 2005-NE-38-AD" in the subject line of your comments. We specifically invite comments on the overall regulatory, economic, environmental, and energy aspects of the rule that might suggest a need to modify it.

We will post all comments we receive, without change, to http://dms.dot.gov, including any personal information you provide. We will also post a report summarizing each substantive verbal contact with FAA personnel concerning this AD. Using the search function of the DMS Web site, anyone can find and read the comments in any of our dockets, including the name of the individual who sent the comment (or signed the comment on behalf of an association, business, labor union, etc.). You may review the DOT's complete Privacy Act Statement in the Federal Register published on April 11, 2000 (65 FR 19477-78) or you may visit http://dms.dot.gov.

Examining the AD Docket

You may examine the docket that contains the AD, any comments received, and any final disposition in person at the Docket Management Facility Docket Office between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. The Docket Office (telephone (800) 647-5227) is located on the plaza level of the Department of Transportation Nassif Building at the street address stated in ADDRESSES. Comments will be available in the AD docket shortlyafter the DMS receives them.

Authority for This Rulemaking

Title 49 of the United States Code specifies the FAA's authority to issue rules on aviation safety. Subtitle I, section 106, describes the authority of the FAA Administrator. Subtitle VII, Aviation Programs, describes in more detail the scope of the Agency's authority.

We are issuing this rulemaking under the authority described in subtitle VII, part A, subpart III, section 44701, "General requirements." Under that section, Congress charges the FAA with promoting safe flight of civil aircraft in air commerce by prescribing regulations for practices, methods, and procedures the Administrator finds necessary for safety in air commerce. This regulation is within the scope of that authority because it addresses an unsafe condition that is likely to exist or develop on products identified in this rulemaking action.

Regulatory Findings

We determined that this AD will not have federalism implications under Executive Order 13132. This AD will not have a substantial direct effect on the States, on the relationship between the national Government and the States, or on the distribution of power and responsibilities among the various levels of government.

For the reasons discussed above, I certify that the regulation:

1. Is not a "significant regulatory action" under Executive Order 12866;

2. Is not a "significant rule" under the DOT Regulatory Policies and Procedures (44 FR 11034, February 26, 1979); and

3. Will not have a significant economic impact, positive or negative, on a substantial number of small entities under the criteria of the Regulatory Flexibility Act.

We prepared a summary of the costs to comply with this AD and placed it in the AD Docket. You may get a copy of this summary at the address listed under ADDRESSES.

List of Subjects in 14 CFR Part 39

Air transportation, Aircraft, Aviation safety, Safety.

Adoption of the Amendment

Under the authority delegated to me by the Administrator, the Federal Aviation Administration amends part 39 of the Federal Aviation Regulations (14 CFR part 39) as follows:

PART 39--AIRWORTHINESS DIRECTIVES

1. The authority citation for part 39 continues to read as follows:

Authority: 49 U.S.C. 106(g), 40113, 44701.

Sec. 39.13 [Amended]

2. The FAA amends Sec. 39.13 by adding the following new airworthiness directive:

Addresses

Use one of the following addresses to comment on this AD:

DOT Docket Web site: Go to http://dms.dot.gov and follow the instructions for sending your comments electronically.

Government-wide rulemaking Web site: Go to http://www.regulations.gov and follow the instructions for sending your comments electronically.

Mail: Docket Management Facility; U.S. Department of Transportation, 400 Seventh Street, SW., Nassif Building, Room PL-401, Washington, DC 20590-0001.

Fax: (202) 493-2251.

Hand Delivery: Room PL-401 on the plaza level of the Nassif Building, 400 Seventh Street, SW., Washington, DC, between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays.

For Further Information Contact

Kevin Donovan, Aerospace Engineer, Engine Certification Office, FAA, Engine and Propeller Directorate, 12 New England Executive Park, Burlington, MA 01803-5299; telephone (781) 238-7743, fax (781) 238-7199.

AD 2005-26-09 — 1st stage fan blades.
Printed from Aircraft-logs.com — 03/26/2026