A-86-125
NTSB Safety Recommendation — Aviation
Recommendation text
THE NTSB RECOMMENDS THAT THE FEDERAL AVIATION ADMINISTRATION: PUBLISH IN THE FEDERAL AVIATION ADMINISTRATION'S ADVISORY CIRCULAR (AC) 43-16, GENERAL AVIATION AIRWORTHINESS ALERTS, AN ARTICLE RELATING TO AIRCRAFT ENGINE CRANKSHAFT FAILURES, WITH SPECIAL EMPHASIS ON THOSE INSTALLED IN TCM IO-520 AND TSIO-520 ENGINES. THE GENERAL OPERATING AND MAINTENANCE PRACTICES OUTLINED IN FAA ADVISORY CIRCULAR NO. 26-103, "AIRCRAFT ENGINE CRANKSHAFT FAILURE," AND IN TCM SERVICE BULLETIN M 77-6, "MAIN BEARING AND TRANSFER COLLAR DISTRESS" SHOULD BE REFERENCED, E.G., SLUGGISH/ERRATIC PROPELLER CONTROL OPERATION, CHECKING OF OIL SCREEN OR FILTER FOR SIGNS OF CONTAMINATION AT EACH OIL CHANGE, ETC.
In plain language (FlightFinder summary)
The Federal Aviation Administration is asked to publish an article in its Advisory Circular (AC) 43-16, General Aviation Airworthiness Alerts, focusing on aircraft engine crankshaft failures, particularly those in TCM IO-520 and TSIO-520 engines. The article should reference maintenance practices from FAA AC 26-103 and TCM Service Bulletin M 77-6, such as checking for sluggish or erratic propeller control and inspecting the oil screen or filter for contamination during oil changes.
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 | Dec 10, 1987 |
| NTSB number | CHI82FA110 |
| Addressees | FAA |
External links
NTSB safety recommendations are advisory; addressees are not legally required to adopt them. Source: NTSB CAROL (public domain).