A-94-168
NTSB Safety Recommendation — Aviation
Recommendation text
THE NTSB RECOMMENDS THAT THE FEDERAL AVIATION ADMINISTRATION: ISSUE AN AIRWORTHINESS DIRECTIVE REQUIRING THAT THE INTERNAL SPLINES OF THE FUEL PUMP DRIVE SHAFT AND EXTERNAL SPLINES OF THE FUEL PUMP DRIVER GEAR ON ALL CHANDLER EVANS COMPANY MFP-261 AND -265 FUEL PUMPS BE PERIODICALLY INSPECTED FOR WEAR AND REPLACED IF THE WEAR EXCEEDS A SPECIFIED AMOUNT. THE WEAR INSPECTION SHOULD INCLUDE A MAGNIFIED VISUAL EXAMINATION OF THE DRIVER GEAR SPLINES FOR A DEGRADED CONDITION. THE INTERVAL FOR THE INSPECTION SHOULD BE ESTABLISHED BASED ON THE FAILURE HISTORY OF THE PUMPS.
In plain language (FlightFinder summary)
The FAA is asked to issue an airworthiness directive requiring periodic wear inspections of the internal splines of the fuel pump drive shaft and external splines of the fuel pump driver gear on all Chandler Evans Company MFP-261 and -265 fuel pumps. The inspections must include a magnified visual examination of the driver gear splines to detect degraded conditions. The inspection interval should be based on the pumps' failure history.
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 | Mar 20, 1996 |
| NTSB number | FTW94MA235 |
| Addressees | FAA |
External links
NTSB safety recommendations are advisory; addressees are not legally required to adopt them. Source: NTSB CAROL (public domain).