SDR ASAA2015031711045

Service difficulty report · Tube · Boeing 737890

Difficulty date: March 17, 2015
Submitted: March 23, 2015
Operation: Air carrier
Aircraft: N589AS
Make and model: Boeing 737890
Aircraft serial: 35686
Aircraft time: 27,962 hours, 8,557 cycles
System (JASC): 3610 · Pneumatic Distribution System
Part: Tube
Part number: 332A23507
Condition: Loose
Location: Nr 1 Engine
Stage of operation: CL
How discovered: 9
Nature of condition: O
Precautionary procedure: O

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

AT TOP OF CLIMB, AT 350, LT DUCT PRESSURE WAS 22, RT WAS 46PSI. AT TOP OF DESCENT THEY READ LT=31, RT=46PSI. ACFT GROUNDED. ACCOMPLISHED TASK 36-00-00-860-807 NR 1 ENGINE BLEED AIR SYS ABBREVIATED TROUBLESHOOTING FOUND CONTROL LINE FROM HIGH STAGE REGULATOR LOOSE AT HIGH STAGE VALVE. SECURED LINE. COMPLETED STEPS 1 THRU 6B.