SDR 99ZZZX1850

Service difficulty report · Screw

Difficulty date
February 10, 1999
Submitted
March 26, 2000
Operation
General aviation
Filed by
IU6R626N
Aero Controls, LLC
Part
Screw
Part number
580867
Condition
Failed
Location
Flap Actuator
Component
Sperryvicrs
Stage of operation
IN
Nature of condition
O
Precautionary procedure
K

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

SHAFT SEAL RETAINING SCREWS, 6 EACH, WERE FOUND BACKED OUT OF THEIR RESPECTIVE SCREW HOLES IN BEARING SLEEVE PN 79092 CAUSING EXCESSIVE LEAKAGE PAST THE SHAFT SEAL O-RING PN 271202. THIS HAS BEEN NOTED TO HAVE OCCURRED ON ANOTHER MOTOR ASSY. STAKE SCREW UPON INSTALLATION OR USE OF LOCKTITE ON SCREW THREADS. INSTALLING A LONGER SCREW FOR BETTER THREAD ENGAGEMENT OR REPLACE THE SCREW WITH A DIFFERENT TYPE/DESIGN. COMPONENT P/N MS9391130ZE4C.