Service difficulty report · Switch · Boeing 747422

Difficulty date
December 10, 1999
Submitted
October 9, 2000
Operation
Air carrier
Aircraft
N199UA
Make and model
Boeing 747422
Aircraft serial
28717
Aircraft time
10,117 hours, 1,218 cycles
Engine
Pwa PW4056
Part
Switch
Condition
Malfunctioned
Location
Cabin
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

EMERGENCY LIGHTS STAY ON WITH COCKPIT SWITCH OFF. AUTOMATIC FUNCTION WORKS NORMALLY WITH SWITCH ARMED. *S/D* REPLACED 1 RT DOOR EMERGENCY LIGHT SWITCH AND SWITCH GARD (CH7724). BOEING IS IN THE PROCESS OF DETERMINING A SOLUTION TO THE FAULTY CARD SWITCH. A RESPONSE IS EXPECTED FROM BOEING IN THE NEAR FUTURE. REF TELEX UAL-OAK 99-00798H.