A-91-025
NTSB Safety Recommendation — Aviation
Recommendation text
THE NTSB RECOMMENDS THAT THE FEDERAL AVIATION ADMINISTRATION: ISSUE AN EMERGENCY AIRWORTHINESS DIRECTIVE APPLICABLE TO ALL GARRETT TFE731-2, -3 AND -3R ENGINES WITH P/N 3072162 -1, -2, -3 OR -4 OR 3073436-1, -2, -3 OR -4 FAN DISCS REQUIRING: (1) AN INITIAL INSPECTION FOR CRACKS IN THE BLADE SLOT AREA AT SUBSTANTIALLY LESS THAN 3,300 SERVICE CYCLES, AND (2) RECURRENT INSPECTIONS AT INTERVALS THAT WILL PRECLUDE FAILURE. (URGENT)
In plain language (FlightFinder summary)
The FAA is asked to issue an emergency airworthiness directive for Garrett TFE731-2, -3, and -3R engines with fan disc part numbers 3072162 or 3073436 in any dash number. The directive would require an initial inspection for cracks in the blade slot area at substantially fewer than 3,300 service cycles, followed by recurrent inspections at intervals that will prevent failure.
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 20, 1991 |
| NTSB number | NYC91LA020 |
| Addressees | FAA |
External links
NTSB safety recommendations are advisory; addressees are not legally required to adopt them. Source: NTSB CAROL (public domain).