What was found
NOISE IN COCKPIT VERY LOUD ON DESCENT REGARDLESS OF RECIRC FAN BEING ON OR OFF. COMPLIED WITH MEL, ACP STEP 6 OFF. THE FLOW AND VELOCITY FAILED. FLOW WAS 437 CFM SHOULD BE BELOW 375 CFM. VELOCITY WAS 5009 FPM SHOULD BE BELOW 3430 FPM.
- Difficulty date
- June 7, 2011
- Submitted
- June 8, 2011
- Operation
- Air carrier
- Aircraft
- N564UA
- Make and model
- Boeing 757222
- Aircraft serial
- 26666
- Aircraft time
- 61,659 hours, 22,807 cycles
- Engine
- Pwa PW2037
- System (JASC)
- 2160 · Cabin Temperature Control System
- Part
- Unknown
- Condition
- Malfunctioned
- Location
- Cockpit
- Stage of operation
- DE
- 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.