What was found
BLEED DUCT PRESS SURGES FROM 0-20 PSI WITH APU SUPPLYING BLEED AND ONE PACK ON. REMOVED AND REPLACED SURGE CONTROL VALVE IAW AMM 49-50-30, LEAK CHECKED , NO LEAKS NOTED.
- Difficulty date
- October 22, 2017
- Submitted
- October 24, 2017
- Operation
- Air carrier
- Aircraft
- N1997A
- Make and model
- Boeing 76733A
- Aircraft serial
- 27310
- Aircraft time
- 92,678 hours, 18,301 cycles
- System (JASC)
- 4950 · APU Bleed Air System
- Part
- Control Valve
- Part number
- 97980612
- Part serial
- 991C
- Condition
- Malfunctioned
- Location
- Apu
- Stage of operation
- TX
- How discovered
- O
- Nature of condition
- O
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.