A-94-190
NTSB Safety Recommendation — Aviation
Recommendation text
THE NTSB RECOMMENDS THAT THE FEDERAL AVIATION ADMINISTRATION: REVISE AIRWORTHINESS DIRECTIVES 90-02-19 AND 93-01-14, APPLICABLE TO BOEING 727 MAIN LANDING GEAR DOOR ACTUATOR FITTING ASSEMBLIES, TO REDUCE THE CURRENT INSPECTION INTERVALS, THEREBY IMPROVING THE POTENTIAL FOR IDENTIFYING LOOSE BOLTS AND CRACKS IN THE ALUMINUM FITTINGS. THE REVISION SHOULD ALSO REQUIRE INSPECTION OF THE LAMINATED SHIMS WITHIN THE ASSEMBLY FOR REDUCTION OF THICKNESS AND DEGREDATION AND REQUIRE CONTINUED PERIODIC INSPECTIONS UNTIL AN ALTERNATIVE DESIGN IS AVAILABLE.
In plain language (FlightFinder summary)
The NTSB asks the FAA to update two airworthiness directives (90-02-19 and 93-01-14) for Boeing 727 main landing gear door actuator fittings by shortening inspection intervals to better detect loose bolts and cracks in the aluminum fittings. The revision would also require inspecting the laminated shims for thickness reduction and degradation, and mandate continued periodic inspections until an alternative design becomes available.
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 | May 1, 1997 |
| NTSB number | MIA94IA110 |
| Addressees | FAA |
External links
NTSB safety recommendations are advisory; addressees are not legally required to adopt them. Source: NTSB CAROL (public domain).