Service difficulty report · Relay · Boeing 74745EF

Difficulty date
July 30, 2019
Submitted
August 1, 2019
Operation
Air carrier
Aircraft
N486MC
Make and model
Boeing 74745EF
Aircraft serial
30608
Aircraft time
84,558 hours, 15,349 cycles
Part
Relay
Part number
BACR13CE2
Part serial
NSN
Condition
Malfunctioned
Location
Park Brake
Stage of operation
TO
How discovered
O
Nature of condition
J
Precautionary procedure
C

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

What was found

DURING T/O ROLL, EICAS WARNING "CONFIG PARK BRAKE" APPEARED. APPROX 70 KTS, PERFORMED RTO AND TAXIED TO PARKING.(<P STYLE="MARGIN: 0IN; MARGIN-BOTTOM: .0001PT;">NO PLF, NO EICAS MSG. REMOVED AND REPLACED RELAY R732 IAW WDM 32-44-11-2. OPS CHECK OK. C/O PARKING BRAKE SYSTEM TEST AND SYSTEM ADJUSTMENT IAW AMM 32-44-00. NO ADJUSTMENT REQUIRED AND ALL INDICATIONS NORMAL. OFF PART (PN: BACR13CD2, SN: NSN)</P><P STYLE="MARGIN: 0IN; MARGIN-BOTTOM: .0001PT;">LP 1070448 - M2: REMOVED AND REPLACED S313 PARKING BRAKE SWITCH LEVER IAW 32-44-11-2 AND C/O ADJUSTMENT IAW AMM 32-44-00. C/O OPS CK OK. DURING T/S, NOTICED INPUT MONITORING E/057/271/00, BIT 12 FLUCTUATING FROM 0-1 WITH BRAKES OFF, OK WITH BRAKES SET. S313 FEEDS SIGNAL TO A13 CONFIG WARNING CARD. A13 ON ORDER. OFF PART (P/N: MS25008-1, SN: NSN)</P><P STYLE="MARGIN: 0IN; MARGIN-BOTTOM: .0001PT;">LP 1070449 - M3: REMOVED AND REPLACED MAWEA YMXA13 CONFIG WARNING CARD REF AMM 31-51-00. C/W MAWEA SYSTEM TEST REF 31-51-00, OPS CKS GOOD. OFF PART (PN: 28540084-215, SN: D02279)</P><P STYLE="MARGIN: 0IN; MARGIN-BOTTOM: .0001PT;">LP 1070449 - M4: REMOVED AND REPLACED PARKING BRAKE MODULE V23 REF AMM 32-44-04. OPS AND LEAKS CKS GOOD.</P><P STYLE="MARGIN: 0IN; MARGIN-BOTTOM: .0001PT;">LP 1070449 - M5: COMPLIED WITH HIGH ENERGY STOP INSPECTION REF AMM 05-51-10, NO DEFECTS NOTED.</P><P STYLE="MARGIN: 0IN; MARGIN-BOTTOM: .0001PT;">LP 1070450 - M6: REMOVED AND REPLACED R7514 RELAY PARK BRAKE, CLOSED RELAY REF WDM 32-44-11 AND SWPM 20-81-00. OPS CKS OKAY.<BR /></P>)

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