SDR CALA2019050300688

Service difficulty report · Tube · Boeing 737724

Difficulty date: May 2, 2019
Submitted: May 3, 2019
Operation: Air carrier
Aircraft: N14704
Make and model: Boeing 737724
Aircraft serial: 28765
Aircraft time: 68,035 hours, 23,746 cycles
System (JASC): 3610 · Pneumatic Distribution System
Part: Tube
Part number: 332A2350911
Condition: Chafed
Location: Bleed Air Sys
Stage of operation: DE
How discovered: O
Nature of condition: G, J
Precautionary procedure: B

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

What was found

WHILE DESCENDING FROM FL390 TO FL330 CABIN ALT HORN SOUNDED. RAN CHECKLIST T/S PER FIM 36-10-00 REF IPC. 36-11-51-02 ITEMS ON NR 1 ENG 220,35, REPLACED LINES AND ON NR 2 ENG ITEM 35 REPLACED LINE. RAN ENG FOUND BLEED PRESSURE NOW WITHIN LIMITS. ALSO REF MM 36-11-00. ALSO REPLACED PRSOV AS PRECAUTIONARY ON NR 1 ENG REF MM 36-11-04. OPS AND LEAK CHECKS GOOD. ROTABLE PARTS CHANGE WAS INDICATED - TT # 1307834 SN OFF 5214 VALVE, PRESSURE OFF 29-3612-9-0004 5214 ON 29-3612-9-0004 4762.