SDR 95ZZZX1820

Service difficulty report · Brake Spring · Boeing 737*

Difficulty date
March 22, 1995
Submitted
March 26, 2000
Operation
General aviation
Filed by
IU6R626N
Aero Controls, LLC
Make and model
Boeing 737*
Part
Brake Spring
Part number
6977851
Condition
Broken
Location
Horiz Stab
Part time
14,307 hours
Component
65C347514
Stage of operation
IN
Nature of condition
L
Precautionary procedure
K

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

What was found

THE HORIZONTAL STABILIZER TRIM GEARBOX FAILED THE AUX BRAKE TEST. UPON DISASSEMBLY, SPRINGS WERE FOUND SHATTERED. THIS CONDITION HAS BEEN FOUND AND REPORTED IN PREVOUS MDR'S. PER BOEING TELEX AEO-AUB-94-0195RR, THE (DASH 1) SPRINGS ARE TO BE REPLACED WITH (DASH 2) SPRINGS AS SUBMITTER SUGGESTS THE (DASH 1) SPRINGS HAD IMPROPER HEAT TREAT OR INCORRECT ALLOYS IN THE SPRINGS.