A-90-092
NTSB Safety Recommendation — Aviation
Recommendation text
THE NTSB RECOMMENDS THAT THE FEDERAL AVIATION ADMINISTRATION: ISSUE AN AIRWORTHINESS DIRECTIVE FOR PIPER AIRCRAFT CORPORATION PA-34 AND PA-44 AIRPLANES HAVING MAIN LANDING GEAR TRUNNIONS IDENTIFIED BY PART NUMBER (P/N) 67926 OR P/N 38486 FOLLOWED BY A SINGLE- OR DOUBLE-DIGIT DASH NUMBER TO REQUIRE PERIODIC INSPECTION AND INSPECTIONS OF THE LOWER FILLET OF THE WEB ON THE AFT SURFACE OF THE TRUNNION FOR EVIDENCE OF CRACKS (BY PERIODIC INSPECTION WITH AN APPROPRIATE NONDESTRUCTIVE TESTING METHOD SUCH AS DYE PENETRANT OR EDDY CURRENT) AND GRINDING MARKS OR SCRATCHES (BY A ONE-TIME DETAILED VISUAL INSPECTION THAT DOES NOT DISTURB THE TRUNNION METAL SURFACE). TRUNNIONS FOUND TO CONTAIN CRACKS SHOULD BE REMOVED FROM SERVICE AND TRUNNIONS FOUND TO CONTAIN GRINDING MARKS OR SCRATCHES SHOULD BE REWORKED BY POLISHING TO REMOVE THESE DISCONTINUITIES.
In plain language (FlightFinder summary)
The Federal Aviation Administration is asked to issue an airworthiness directive for Piper PA-34 and PA-44 airplanes with specific main landing gear trunnions (part numbers 67926 or 38486 followed by a dash number). The directive would require periodic inspections for cracks using nondestructive testing, a one-time visual inspection for grinding marks or scratches, and removal or rework of affected trunnions.
This plain-language summary is written by FlightFinder to explain the recommendation above. It is not the official wording — the verbatim NTSB text is quoted above.
Details
| Status | Closed - Acceptable Action |
|---|---|
| Mode | Aviation |
| Closed | Sep 13, 1994 |
| NTSB number | 80674 |
| Addressees | FAA |
External links
NTSB safety recommendations are advisory; addressees are not legally required to adopt them. Source: NTSB CAROL (public domain).