Service difficulty report · O-Ring · Boeing 737890

Difficulty date
August 7, 2021
Submitted
August 10, 2021
Operation
Air carrier
Aircraft
N529AS
Make and model
Boeing 737890
Aircraft serial
35198
Aircraft time
40,288 hours, 11,878 cycles
Engine
Cfmint CFM567B27
Part
O-Ring
Part number
J221P137J221P027
Condition
Worn
Location
Nr 1 Eng Oil
Stage of operation
IN
How discovered
9
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 TREND INCREASING ON RECENT FLIGHTS. GROUNDED - YES. ACCOMPLISHED STEP 1 OF TSR FOUND #1 ENGINE DRY PAD LEAKING, AND FOUND OUTER SEALS ON LUBRICATION UNIT LEAKING. REMOVED AND REPLACED #1 ENG DRY PAD "O" RINGS PER B737-800 AMM 72-63-01-400-801. ACCOMPLISHED LEAK CHECK OF 1 ENG DRIVE PAD REF AMM 72-63-01-400-801 F00 STEP 3,G. REMOVED AND REPLACED PACKINGS ON INNER SEALING SPOOL OF LUBRICATION UNIT PER AMM 79-21-01-400-802-F00. LEAK CK GOOD. ENG OIL WAS DRAIN & SERVICED PER AMM 12-13-11-600-803. ACCOMPLISHED TEST 3B PART POWER LEAK CHECK. NO LEAKS NOTED.