A-94-167
NTSB Safety Recommendation — Aviation
Recommendation text
THE NTSB RECOMMENDS THAT THE FEDERAL AVIATION ADMINISTRATION: ISSUE AN EMERGENCY AIRWORTHINESS DIRECTIVE REQUIRING THAT THE INTERNAL SPLINES OF THE FUEL PUMP DRIVESHAFT AND THE EXTERNAL SPLINES OF THE FUEL PUMP DRIVER GEAR ON ALL CHANDLER EVANS COMPANY MFP-261 AND -265 FUEL PUMPS USED IN SINGLE-ENGINE APPLICATIONS FOR MORE THAN A SPECIFIED NUMBER OF HOURS SINCE OVERHAUL BE INSPECTED FOR WEAR AND REPLACED IF THE WEAR EXCEEDS A SPECIFIED AMOUNT. THE SPECIFIED TIME FOR INSPECTION SHOULD BE BASED UPON THE FAILURE HISTORY OF THE PUMP. THE WEAR INSPECTION SHOULD INCLUDE A MAGNIFIED VISUAL EXAMINATION OF THE DRIVER GEAR SPLINES FOR A DEGRADED CONDITION. (URGENT)
In plain language (FlightFinder summary)
The FAA is asked to issue an emergency airworthiness directive mandating inspection of the internal splines of the fuel pump driveshaft and external splines of the fuel pump driver gear on Chandler Evans Company MFP-261 and -265 fuel pumps used in single-engine applications. The inspection must be performed after a specified number of hours since overhaul, based on the pump's failure history, and includes a magnified visual examination for wear, with replacement required if wear exceeds a specified amount.
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 | May 17, 1995 |
| 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).