SDR ASAA2013071295583

Service difficulty report · Bleed Air Sys · Boeing 737890

Difficulty date: July 12, 2013
Submitted: July 16, 2013
Operation: Air carrier
Aircraft: N594AS
Make and model: Boeing 737890
Aircraft serial: 35191
Aircraft time: 20,394 hours, 6,282 cycles
System (JASC): 3610 · Pneumatic Distribution System
Part: Bleed Air Sys
Condition: Malfunctioned
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

ON CLIMBOUT, FL 270, NOTICED A DUCT SPLIT OF 21PSI, LT 25 PSI, RT 46PSI WITH N1S 100.2. PRESSURIZATION WAS NORMAL. ADDITIONAL INFO AT CRUISE FLT (FL 380 - N1S 88.6). THERE WAS NO DUCT SPLIT. ON DESCENT BOTH DUCT PRESSURES READ 25PSI AND NO SPLIT. ACFT GROUNDED. OPEN.