A-91-013
NTSB Safety Recommendation — Aviation
Recommendation text
THE NTSB RECOMMENDS THAT THE FEDERAL AVIATION ADMINISTRATION: ISSUE AN AIRWORTHINESS DIRECTIVE TO REQUIRE THAT THE P/N 3106469-01 GAS GENERATOR CASE INSTALLED IN PRATT & WHITNEY OF CANADA JT15D-4B ENGINES BE INSPECTED WITHIN THE NEXT 10 FLIGHT HOURS AND AT APPROPRIATE INTERVALS THEREAFTER, FOR CRACKS IN THE AREA ADJACENT TO THE OUTER CASE SPOT WELDS; ANY CASE FOUND TO HAVE ANY CRACKS IN THIS AREA SHOULD BE REPLACED BEFORE FURTHER FLIGHT. (URGENT)
In plain language (FlightFinder summary)
The NTSB asks the FAA to issue an airworthiness directive requiring inspection of the P/N 3106469-01 gas generator case installed in Pratt & Whitney of Canada JT15D-4B engines for cracks near the outer case spot welds within the next 10 flight hours and at intervals thereafter, with replacement of any cracked case before further flight.
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 - Unacceptable Action |
|---|---|
| Mode | Aviation |
| Closed | Sep 20, 1991 |
| NTSB number | ATL91IA024 |
| Addressees | FAA |
External links
NTSB safety recommendations are advisory; addressees are not legally required to adopt them. Source: NTSB CAROL (public domain).