What was found
P5-13 TR UNIT ANNUNCIATOR LIGHT ILLUMINATED. WARNING HORN IN NOSE WHEEL WELL ON. ACFT GROUNDED. FOUND TRU2, TRU3, & EQUIPMENT COOLING EXHAUST FAN NORMAL. REF WDM 24-51-11, 24-51-21, 24-32-11, & 21-27-21. REMOVED TRU 1&2. GVI OF TR'S & ASSOCIATED WIRING. NO FAULTS NOTED. REINSTALLED TR'S REF MM 24-32-11. ACCESSED EQUIPMENT COOLING FANS. GVI OF FANS & WIRING, NO FAULTS NOTED. TRU'S OP NORMAL. EQUIPMENT COOLING FAN OPS NORMAL. C/B'S REMAIN SET. TRANSFERRED GROUND POWER TO APU AND BACK TO GROUND POWER SEVERAL TIMES. NO FAILURES NOTED. HAS NO OTHER RECENT HISTORY.