What was found
L HPSOV FLUCTUATES WITH THROTTLES AT IDLE IN DESCENT. DURING PNEUMATIC HEALTH CHECK FOUND HPSOV SLUGGISH AND CONTROLLER FAILING TO COMMAND VALVE CLOSURE. REPLACED VALVE AND CONTROLLER. ALL CHECKS NORMAL.
- Difficulty date
- November 27, 2009
- Submitted
- December 14, 2009
- Operation
- Air carrier
- Aircraft
- N648UA
- Make and model
- Boeing 767322
- Aircraft serial
- 25285
- Aircraft time
- 73,558 hours, 11,924 cycles
- Engine
- Pwa PW4060
- System (JASC)
- 3610 · Pneumatic Distribution System
- Part
- Controller
- Part number
- 77328915
- Part serial
- 78
- Condition
- Faulty
- Location
- Nr 1
- Stage of operation
- DE
- How discovered
- O
- Nature of condition
- J
- Precautionary procedure
- O
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.