SDR HALA2011051500197

Service difficulty report · Pneumatic System · Boeing 7673CB

Difficulty date: May 15, 2011
Submitted: May 16, 2011
Operation: Air carrier
Aircraft: N588HA
Make and model: Boeing 7673CB
Aircraft serial: 33466
Aircraft time: 33,007 hours, 6,153 cycles
System (JASC): 3610 · Pneumatic Distribution System
Part: Pneumatic System
Condition: Fluctuates
Stage of operation: CL
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.

What was found

ETOPS SIGNIFICANT SYS - ON CLIMBOUT AND INITIAL DESCENT, LT PNUEMATIC DUCT PRESSURE FLUCUATED 10-15 PSI. CHECKED AND CLEANED FILTERS ON PRC REGULATOR AND FAN AIR CONTROL VALVE AND PRSOV IAW AMM 36-11-19-404-034 AND AMM 36-11-09-422-163, AMM 36-11-17. PERFORMED ENGINE RUN IAW AMM 71-00-00 DUCT PRESS STEADY 32 PSI IDLE, 38 PSI AT POWER COULD NOT DUPLICATE ON GROUND.

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