Service difficulty report · Spring · Boeing 747422

Difficulty date
March 29, 2016
Submitted
March 31, 2016
Operation
Air carrier
Aircraft
N179UA
Make and model
Boeing 747422
Aircraft serial
25158
Aircraft time
101,491 hours, 11,965 cycles
Engine
Pwa PW4056
Part
Spring
Condition
Missing
Location
Light Switch
Stage of operation
IN
How discovered
O
Nature of condition
O
Precautionary procedure
O

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

What was found

EMERGENCY EXIT LIGHTS TURN ON WITH THE SWITCH IN THE OFF POSITION. FOUND GUARD ON EMER LIGHT SWITCH AT DOOR 1L MISSING SPRINGS & SLIDING OVER PUSH BUTTON SWITCH & ENGAGING EMER LIGHTS. REPLACED GUARD IAW IPC 33-21-56-01 & ACCOMPLISHED OPERATION CHECK OF EMER LIGHT IAW AMM 33-51-00. OPERATION CHECKED NORMAL.