SDR ASAA2018102626602

Service difficulty report · Sense Line · Boeing 737890

Difficulty date: October 24, 2018
Submitted: October 26, 2018
Operation: Air carrier
Aircraft: N535AS
Make and model: Boeing 737890
Aircraft serial: 35200
Aircraft time: 30,346 hours, 8,835 cycles
System (JASC): 3620 · Pneumatic Indicating System
Part: Sense Line
Part number: 1613596
Condition: Leaking
Location: Bleed Air Sys
Stage of operation: CL
How discovered: O
Nature of condition: O
Precautionary procedure: K

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

What was found

DUCT PRESSURE SPLIT IN FLIGHT 5,000 ' CLB L75 R45, FL370 CRZ L35 R38, FL290 DES L20 R20, 10,000 DES L28 R28. GROUNDED - YES. CHECKED BLEED INDICATION WITH APU, BOTH LT AND RT IND. NORMAL. PERFORMED PNEUMATIC SYSTEM TROUBLE SHOOTING PER AMM 36-11-00. PRSOV CHECKS GOOD. HIGH STAGE VALVE CHECKS GOOD, PCCV CHECKED GOOD. FOUND DOWN STREAM SENSE LINE LEAKING REPLACED LINE, LEAK CK GOOD AND OPS CHECKED GOOD PER FIM 36-10 TASK 803.