SDR 99ZZZX4649

Service difficulty report · Spring · Boeing 737*

Difficulty date
November 12, 1999
Submitted
March 26, 2000
Operation
General aviation
Filed by
IU6R626N
Aero Controls, LLC
Make and model
Boeing 737*
Part
Spring
Part number
69778551
Condition
Cracked
Location
Horizontal Stab
Part time
18,876 hours
Component
65C347512
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. IMPROPER HEAT-TREATING, AUSTENITE, FATIGUE, AND INCREASED SPRING COIL STRESSES.