A-86-128
NTSB Safety Recommendation — Aviation
Recommendation text
THE NTSB RECOMMENDS THAT THE FEDERAL AVIATION ADMINISTRATION: REQUIRE AN IMMEDIATE INSPECTION USING METHODS ADEQUATE TO DETECT FATIGUE CRACKING OF THE WING REAR SPAR WITH EMPHASIS ON THE SPAR WEB AT THE LOWER INBOARD FASTENER HOLE FOR THE FORWARD SIDE DOUBLER REINFORCING THE FUEL FILLER VALVE HOLE OF ALL LOCKHEED L-1011 AIRPLANES HAVING MORE THAN A CONSERVATIVELY ESTABLISHED THRESHOLD OF BOTH FLIGHT HOURS AND FLIGHT CYCLES; THE THRESHOLD SHOULD BE PREDICATED UPON THE TIME AND CYCLES ON THE ACCIDENT PLANE. (URGENT)
In plain language (FlightFinder summary)
The FAA is asked to require immediate inspections for fatigue cracking of the wing rear spar on all Lockheed L-1011 airplanes that exceed a conservatively established threshold of both flight hours and flight cycles, based on the accident aircraft. The inspection must focus on the spar web at the lower inboard fastener hole of the forward side doubler reinforcing the fuel filler valve hole and use methods capable of detecting fatigue cracks.
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 | Mar 17, 1987 |
| NTSB number | DCA87MA012 |
| Addressees | FAA |
External links
NTSB safety recommendations are advisory; addressees are not legally required to adopt them. Source: NTSB CAROL (public domain).