A-81-001
NTSB Safety Recommendation — Aviation
Recommendation text
THE NTSB RECOMMENDS THAT THE FEDERAL AVIATION ADMINISTRATION: ISSUE AN IMMEDIATE AIRWORTHINESS DIRECTIVE TO REQUIRE THAT OPERATORS OF L-1011 AIRCRAFT AT THE NEXT TIRE CHANGE OR WITHIN 20 CYCLES, WHICHEVER IS SOONER, MEASURE THE FLANGE THICKNESS ON ALL P/N 3-1365 WHEELS WITH SERIAL NUMBER UP TO 1404 WHICH HAVE BEEN USED ON AIRCRAFT WITH A GROSS TAKEOFF WEIGHT OF 430,000 POUNDS OR MORE, AND INCLUDE IN THE AIRWORTHINESS DIRECTIVE A REQUIREMENT TO REMOVE ALL WHEELS WITH OUTER FLANGE THICKNESS OF LESS THAN 0.490 INCH AND INSTALLED ON AIRCRAFT OPERATING AT GROSS TAKEOFF WEIGHTS OF 430,000 POUNDS OR MORE. FURTHER REQUIREMENTS SHOULD INCLUDE AT EACH WHEEL DISASSEMBLE OF ALL P/N 3-1365 AND P/N 3-1311 WHEELS, AN INSPECTION IN ACCORDANCE WITH PROCEDURES WHICH HAVE BEEN EVALUATED BY THE FAA AND DEMONSTRATED BY INDUSTRY EXPERIENCE TO BE EFFECTIVE IN DETECTING IN-SERVICE CRACKING PRIOR TO FAILURE. (URGENT)
In plain language (FlightFinder summary)
The NTSB asks the FAA to issue an urgent airworthiness directive requiring operators of L-1011 aircraft with certain wheels to measure flange thickness and remove undersized wheels, plus perform inspections on specific wheel part numbers at each disassembly.
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 Alternate Action |
|---|---|
| Mode | Aviation |
| Closed | Aug 13, 1981 |
| NTSB number | 79910 |
| Addressees | FAA |
External links
NTSB safety recommendations are advisory; addressees are not legally required to adopt them. Source: NTSB CAROL (public domain).