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SDR 99ZZZX1651

Open the Markdown

Service difficulty report · Adc · Boeing 737*

FAA SDR system

Difficulty date
March 9, 1999
Submitted
March 26, 2000
Operation
General aviation
Make and model
Boeing 737*
System (JASC)
3417 · Air Data Computer
Part
Adc
Part number
HG180U323
Condition
Damaged
Location
E/E Bay
Stage of operation
IN
Nature of condition
O
Precautionary procedure
K

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

What was found

THIS AIR DATA COMPUTER IS USED ON A BOEING 737. EXCESSIVE LOAD ON J3 PINS CAUSED CONNECTOR J3 TO MELT AROUND THESE PINS. ADAPTER DG120 WAS NOT INCLUDED WITH AIR DATA COMPUTER. SUSPECT WATER DAMAGE TO DG120, WHICH CAUSED SHORTS AND OVERLOADS. IN THIS CONDITION EVEN IF HG180U POWER IS TURNED OFF, OUTPUT SIGNALS WILL BE POSSIBLE ON THESE FUNCTIONS.