Service difficulty report · Relay · Boeing 777222

Difficulty date
August 5, 2024
Submitted
August 6, 2024
Operation
Air carrier
Aircraft
N209UA
Make and model
Boeing 777222
Aircraft serial
30215
Aircraft time
96,225 hours, 11,598 cycles
Engine
Pwa PW4090
Engine time
24,205 hours, 2,843 cycles
Part
Relay
Part number
8112507
Part serial
41000162
Condition
Failed
Location
Nr 2 Eng
Part time
93,071 hours, 704,024 cycles
Stage of operation
UK
How discovered
O
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

ENG IGNITOR R2 STATUS MSG AWAITING TOMC APRVL TO DEF R ENG IGNITOR 2 PER MEL 7400D M-PROCEDURE C/W PLACARD INSTALLED TOMC APPROVES MEL 7400D DEF. RT ENG NBR 2 IGNITOR INOP PER MEL 7400D M-PROCEDURE C/W PLACARD INSTALLED *DM* REF. AIPC 74-11-21-02-01 ITEM 5 ADDING INGITER PLUG M&E 27-7421-3-0001 IN CASE NEEDED. ACPD MAT TEST ENGINE IGNITION TEST, NO AUDIBLE SPARK HEARD FROM R2 LOWER IGNITOR. RAN TEST AGAIN AND TAPPED ERU DURING TEST AND HAD INTERMITTANT SPARK, SUSPECT BAD ERU 27-7321-9-0002. PARTS ORDERING SHOWS NIS SFO, BUT 2 SERVICEABLE UNITS IN SFOPD PW4000 FLOWLINE. ENG 2 WIRES CHECKED GOOD FROM ERU CONNECTOR DM73005A TO IGN EXCITER 2 CONNECTOR DM74002. VERIFIED 115VAC AT PIN 9 AT DM 73005A WHEN START LEVER IN THE RUN POSITION. SUSPECT BAD ERU OR EEC. REF SSM 74-11-21-101.