| AD Number | 91-03-01 | Status | Active |
| Effective Date | February 14, 1991 | Issue Date | Not specified |
| Docket Number | 90-ASW-47-AD | Amendment | 39-6862 |
| Product Type | ["Aircraft"] | Product Subtype | ["Rotorcraft"] |
| CFR Part | --- - Part 39 | CFR Section | N/A |
| Citation | This information is not available. | ||
| Manufacturer(s) | Columbia Helicopters, Inc. |
| Model(s) | 234 |
91-03-01 BOEING HELICOPTERS (BOEING VERTOL HELICOPTER CO.): Amendment 39-6862. Docket No. 90-ASW-47-AD.
Applicability: All Model 234 series helicopter, with serial numbers (S/N) MJ001, MJ002, MJ003, MJ005, MJ006, MJ016, MJ017, MJ022, MJ023, MM819, MM820, and MM821, certificated in any category.
Compliance: Required as indicated, unless previously accomplished.
To prevent failure of a rotor blade damper elastomeric rod end, which could result in the rotor blade striking the helicopter during start up or shut down, accomplish the following:
(a) Within the next 10 hours' time in service after the effective date of this AD inspect all rod ends, part number (P/N) 234RS202-1 and -2, with more than 350 hours' time in service, unless accomplished within the last 40 hours' time in service. Thereafter, inspect these rod ends at intervals not to exceed 25 hours' time in service from the last inspection. Conduct these inspections using eddy current inspection methodsapproved by the FAA.
NOTE: The Accomplishment Instructions of paragraphs 3.B and C of Boeing Helicopters Service Bulletin 234-62-1031, dated September 26, 1990, provide an FAA approved calibration and inspection procedure for eddy current inspection of the rod ends.
(b) Conduct an FAA approved eddy current inspection of any used spare serviceable rod end, P/N 234RS202-1 or -2, with more than 350 hours' time in service prior to installation and return to service, and thereafter at intervals not to exceed 25 hours' time in service from the last inspection.
(c) If a crack is found, replace the cracked rod end with a serviceable rod end prior to further flight.
(d) Helicopters may be ferried in accordance with the provisions of FAR Sections 21.197 and 21.199 to a base where the requirements of the AD can be accomplished.
(e) Alternate inspections, modification, other actions, or adjustment of the compliance times, which provides an equivalent level of safety maybe used when approved by the Manager, New York Aircraft Certification Office, FAA, 181 South Franklin Avenue, Room 202, Valley Stream, New York.
This amendment (39-6862, AD 91-03-01) becomes effective on February 14, 1991.