# SDR 99UAL900641

- Type: Service difficulty report (as reported; unverified)
- 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
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Switch
- Condition: Malfunctioned
- Location: Cabin
- Stage of operation: IN
- How discovered: C
- Nature of condition: L
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/99UAL900641

## Discrepancy

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.

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