What was found
LEFT ENGINE DUCT PRESSURE FLUCTUATES. PRESSURE FLUCTUATES BETWEEN 15 AND 30. NORMAL PSI IS 26-29. REPLACED HIGH STAGE VALVE AND HIGH STAGE PILOT AND ACCOMPLISHED PNEUMATIC TEST, ALL NORMAL. ACCOMPLISHED TEST, BLEED SHIFT OK.
- Difficulty date
- July 31, 2009
- Submitted
- August 3, 2009
- Operation
- Air carrier
- Aircraft
- N596UA
- Make and model
- Boeing 757222
- Aircraft serial
- 28749
- Aircraft time
- 45,536 hours, 12,638 cycles
- Engine
- Pwa PW2037
- System (JASC)
- 3610 · Pneumatic Distribution System
- Part
- Valve
- Part number
- 33990046U2
- Part serial
- 121
- Condition
- Faulty
- Location
- Bleed Air Sys
- Stage of operation
- NR
- How discovered
- O
- Nature of condition
- O
- Precautionary procedure
- O
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.