Service difficulty report · Switch · Boeing 747422

Difficulty date
September 19, 2012
Submitted
October 12, 2012
Operation
Air carrier
Aircraft
N119UA
Make and model
Boeing 747422
Aircraft serial
28812
Aircraft time
56,692 hours, 6,565 cycles
Engine
Pwa PW4056
Part
Switch
Condition
Dirty
Location
Control Panel
Stage of operation
IN
How discovered
C
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

CARGO FIRE BOTTLE SQUIB TEST 1 FOR CARGO BOTTLE A DOES NOT ILLUMINATE DURING TEST. SAMC TEXT: ALSO CARGO FIRE BOTTLE SQUIB TEST 2 FOR CARGO BOTTLED DOES NOT ILLUMINATE DURING TEST. NO TIME TO TROUBLESHOOT, APPLIED MEL AND ACP FIRE EXT DISCHARGE CIRCUIT TEST PORTION OF 26-23-00-501. LOCATED THE PROBLEM DIRECTLY TO THE PUSH TO TEST SWITCH ON THE OVERHEAD PANEL, DEPENDENT ON HOW MUCH PRESSURE YOU APPLY ON THE SWITCH THE LIGHTS WILL CYCLE ON AND OFF. REQUIRES PANEL 181-0028 IPC26-21-02 PAGE2. CLEANED BOTH SWITCH CONTACTS & RE-SEATED LIGHT CAPS. OP CK GOOD.