# SDR 2008UALA02330

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 20, 2008
- Submitted: April 23, 2008
- Operation: Air carrier
- Aircraft: [N771UA](https://openairdocs.org/aircraft/N771UA), registered now
- Make and model: Boeing 777222
- Aircraft serial: 26932
- Aircraft time: 49,353 hours, 9,477 cycles
- Engine: Pwa PW4077
- System (JASC): [2600 · Fire Protection System](https://openairdocs.org/jasc/2600)
- Part: Bottle
- Condition: Unknown
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2008UALA02330

## Discrepancy

WHILE ACCOMPLISHING EG8515 FOR CARGO PIT FIRE BOTTLE CHECK, NOTICED THAT WHEN DISC SWITCH IS PUSHED THAT VOLTAGE AT SQB CONN SPIKES TO 24.96 VDC FOR A SPLIT SECOND THEN GOES BACK TO APPROX ZERO AND STAYS ZERO UNTIL 20 MINS WHEN IT GOES TO APPROX 24 VDC AS STATED IN MM.  SHOULD NOT HAVE THAT INITIAL SPIKE OF 24.96 VDC AT BOTTLE 2C.                     


---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.