SDR ASAA2013020393816

Service difficulty report · Relay · Boeing 737890

Difficulty date: February 3, 2013
Submitted: February 5, 2013
Operation: Air carrier
Aircraft: N537AS
Make and model: Boeing 737890
Aircraft serial: 35204
Aircraft time: 4,120 hours, 1,241 cycles
System (JASC): 3030 · Pitot/Static Anti-Ice System
Part: Relay
Part number: ES4101538
Condition: Inoperative
Location: Probe Heat
Stage of operation: TX
How discovered: O
Nature of condition: P
Precautionary procedure: O

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

What was found

ON THE GROUND WITH ENGINES OFF, PROBE LIGHTS ON THE RT SIDE (F/O PITOT, R ELEV. PITOT, RT ALPHA VANE, AUX. PITOT) ARE OUT (NOT ILLUMINATED) WITH THE PROBE HEAT SWITCH IN AUTO. REF WIRE DIAGRAM 30-31-12 FOUND R1073 RELAY B FAULTY. R & R R1073, RELAY B PERFORMED SYS TEST IAW AMM 30-31-00. OPS CHECK NORMAL. ALL SYS CHECKED NORMAL.