92-25-02 FOKKER: Amendment 39-8417. Docket No. 92-NM-96-AD.
Applicability: All Model F28 Mark 0100 series airplanes, certificated in any category.
Compliance: Required as indicated, unless accomplished previously.
To prevent false indications to the crew that the landing gear is not down and locked, accomplish the following:
(a) Within 120 days after the effective date of this AD, identify the serial number on the nameplate of the main landing gear downlock actuator, part number 201218001 or 201218002.
(1) If the serial number identified on the nameplate is not one of the following serial numbers, no further action is required by this AD:
Part Number 201218001
Part Number 201218002
CWDD/DRG/1/88 to CWDD/DRG/20/88
CWDD/DRG/1/88 to CWDD/DRG/19/88
CWDD/DRG/1/89 to CWDD/DRG/25/89
CWDD/DRG/1/89 to CWDD/DRG/32/89
CWDD/DRG/1/90 to CWDD/DRG/42/90
CWDD/DRG/1/90 to CWDD/DRG/34/90
CWDD/DRG/1/91 to CWDD/DRG/13/91
CWDD/DRG/1/91 to CWDD/DRG/10/91
(2) If the serial number identified on the nameplate is one of the affected serial numbers specified in paragraph (a)(1) of this AD, and if "F100-32-45" is identified on the nameplate, no further action is required by this AD.
(3) If the serial number identified on the nameplate is one of the affected serial numbers specified in paragraph (a)(1) of this AD, and if "F100-32-45" is not identified on the nameplate, prior to further flight, replace the downlock actuator with one that has "F100-32-45" identified on the nameplate, or one that is not one of the affected serial numbers specified in paragraph (a)(1) of this AD, in accordance with Fokker Service Bulletin SBF100-32-052, dated May 1, 1991.
(b) As of the effective date of this AD, no main landing gear downlock actuator, part number 201218001 or 201218002, having a serial number that is specified in paragraph (a)(1) of this AD, shall be installed on any airplane unless "F100-32-045" is identified on the nameplate.
(c)An alternative method of compliance or adjustment of the compliance time that provides an acceptable level of safety may be used if approved by the Manager, Standardization Branch, ANM-113, FAA, Transport Airplane Directorate. Operators shall submit their requests through an appropriate FAA Principal Maintenance Inspector, who may add comments and then send it to the Manager, Standardization Branch.
NOTE: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the Standardization Branch.
(d) Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate the airplane to a location where the requirements of this AD can be accomplished.
(e) The replacement shall be done in accordance with Fokker Service Bulletin SBF100-32- 052, dated May 1, 1991. This incorporation by reference was approved by the Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR Part 51. Copies may be obtained from Fokker Aircraft USA, Inc., 1199 North Fairfax Street, Alexandria, Virginia 22314. Copies may be inspected at the FAA, Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton, Washington; or at the Office of the Federal Register, 800 North Capitol Street, NW., suite 700, Washington, DC.
(f) This amendment becomes effective on December 23, 1992.