A-96-021
NTSB Safety Recommendation — Aviation
Recommendation text
THE NTSB RECOMMENDS THAT THE FAA: REQUIRE AN IMMEDIATE INSPECTION (BY A NONDESTRUCTIVE METHOD SUCH AS FLUORESCENT PENETRANT OR ULTRANSONIC) OF TURBINE HUBS ON PRATT & WHITNEY MODEL JTID ENGINE THAT WERE MANUFACTURED FROM INCOLOY 901 ALLOY & MADE FROM ONE OF THE TOP THREE MULTS OF A BILLET IN WHICH CERIUM &/OR LANTHANUM WAS USED AS A DEOXIDIZING AGENT & THAT HAVE NOT BEEN PREVIOUSLY INSPECTED WITHIN A REASONABLY CYCLIC INTERVAL (SUBSTANTIALLY LESS THAN 5,900 FLIGHT CYCLES). (URGENT)
In plain language (FlightFinder summary)
The FAA is asked to require immediate nondestructive inspections (such as fluorescent penetrant or ultrasonic) of turbine hubs on Pratt & Whitney Model JTID engines. The hubs must be made from Incoloy 901 alloy from certain billets where cerium or lanthanum was used as a deoxidizer, and they must not have been previously inspected within a cyclic interval substantially less than 5,900 flight cycles.
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 | Jul 23, 1998 |
| NTSB number | NYC96SA057 |
| Addressees | FAA |
External links
NTSB safety recommendations are advisory; addressees are not legally required to adopt them. Source: NTSB CAROL (public domain).