SDR HALA2018032000112

Service difficulty report · Indicator · Boeing 7673CB

Difficulty date: March 18, 2018
Submitted: March 20, 2018
Operation: Air carrier
Aircraft: N590HA
Make and model: Boeing 7673CB
Aircraft serial: 33467
Aircraft time: 57,576 hours, 10,552 cycles
System (JASC): 3610 · Pneumatic Distribution System
Part: Indicator
Condition: False Indication
Location: Duct Pressure
Stage of operation: CR
How discovered: O
Nature of condition: N
Precautionary procedure: O

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

What was found

LEFT DUCT PRESSURE INDICATOR SPIKES TO 40 PSI WHEN THRUST LEVERS RETARD IN CRUISE AND LEVEL OFF. RIGHT INDICATOR REMAINS AT 20 PSI. PERFORMED FIM AIR SUPPLY BITE PROCEDURE, FIG 104, SHEET 1 TO 6, BLOCK 3, 36-20 WITH NO DISCREPANCIES NOTED AND SYSTEM IS OK FOR SERVICE.

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