SDR 99ZZZX3632

Service difficulty report · Springs · Boeing 737*

Difficulty date: August 27, 1999
Submitted: March 26, 2000
Operation: General aviation
Filed by: IU6R626N
Aero Controls, LLC
Make and model: Boeing 737*
System (JASC): 2740 · Stabilizer Control System
Part: Springs
Part number: 69778551
Condition: Cracked
Location: Horiz Stabilizer
Part time: 18,942 hours
Component: 654997025
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

SPRINGS PN 69-77855-1 ARE BROKEN IN THE AUXILIARY BRAKE SYSTEM. POSSIBE CAUSE, IMPROPER HEAT TREATING OR INCORRECT ALLOYS IN THE SPRINGS. SPRINGS PN 69-777855-1 SHOULD BE REPLACED WITH PN 69-77855-2 SPRINGS PER BOEING TELEX AEO-AUB-94-0195RR.