Service difficulty report · Heat Exchanger · Boeing 737890

Difficulty date
July 15, 2023
Submitted
July 24, 2023
Operation
Air carrier
Aircraft
N557AS
Make and model
Boeing 737890
Aircraft serial
35176
Aircraft time
62,600 hours, 18,282 cycles
Part
Heat Exchanger
Part number
118411934
Part serial
YP0290386
Condition
Failed
Location
#1 Engine
Part time
70,814 hours, 26,870 cycles
Stage of operation
IN
How discovered
O
Nature of condition
K
Precautionary procedure
K

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

What was found

#1 ENGINE OIL TREND DATA SHOWS OIL CONSUMPTION TO GREATER THAN EXPECTED. (#PRI2/ETOPS)ENGINE POWER RUN REQUIRED. GROUNDED - YES. (RESOLVED ON W/O: 1961392 TASKCARD: N/R-00002 ) ACCOMPLISHED STEPS 1-5. NO SIGN OF OBVIOUS LEAKS FOUND. 8 DRAINS BAGGED. D BARRET 41959 07/23/2023 REMOVED 8 DRAIN LINE BAGS. ACCOMPLISHED TEST 3B & FOUND #1 ENG IDG SEAL-OL SEAL & FUEL PUMP SEAL-OL LEAKING. REMOVED & REPLACED IDG SEAL-OL SEAL REF AMM 24-11-11-000-801 & AMM 72-60-00-400-802-FOO. REQUIRES #1 ENGINE IDG OPS TEST. N WARD 43158 7/23/2023. ACCOMPLISHED ALT DEACT. PER ASAMP CHAP 5 ITEMS 1,3,4,7,8 OF TABLE 3. D. 00711 7/23/2023. REMOVED FUEL PUMP PACKAGE REF T/C N8473002 CYG 43296. 07/23/2023 INITIATED MIG 2C SERIAL# 40-0054896. INSTALLED FUEL PUMP PACKAGE PER T/C N8473003. LEAK AND OPS CK GOOD. T SWANSON 52800 7/24/2023. NVW 41958 07/24/2023. #1 IDG OPS TEST GOOD PER AMM 24-11-00-700-802. NO LEAKS NOTED. REMOVED BAGS FROM DRAINS. ALT DEACTIVATION REBERSED. CLOSED FAN COWLS & T/R'S. MIG2C 40-0054896 CLOSED. REF LP 60578709 FOR SEALOL SEAL LEAK CHECK. TSR CLOSED. SEAMC WILL NOTIFIED.