NYC84IA225
1984-06-27 · Portland, Maine, United States · Minor · 1 aircraft · Status: Completed
Airport PWM
Aircraft involved
Factual narrative
CAPTAIN HEARD LOUD 'POP' AND OBSERVED AN ELECTRICAL PANEL INTERRUPTION ALONG WITH ILLUMINATION OF RT 'BUS OFF' & 'GEN OFF BUS' LIGHTS. NO GENERATOR AMPS OR FREQS WERE OBSERVED. FAINT ODOR OF SMOKE. CAPT STARTED APU AND PUT APU GENERATOR ON RT SIDE. 'BUS OFF' LIGHT EXTINQUISHED. WITHIN A MINUTE, SMOKE LEVEL INCREASED. CAPT REMOVED APU & CALLED FOR ELECTRICAL SMOKE AND FIRE CHECKLIST. EMERGENCY LANDING PERFORMED DURING WHICH ALL 4 MAIN GEAR TIRES FAILED. CREW & PAX PERFORMED EMERGENCY EVACUATION. INSPECTION OF ACFT DISCLOSED THE FAILURE IN THE GENERATOR CONTROL UNIT OCCURRED IN A CAPACITOR INSTALLED IN THE CIRCUIT. FAILURE OF THE #2 GENERATOR CONTROL UNIT RENDERED THE ANTI-SKID SYSTEM INOP RESULTING IN THE TIRE FAILURES. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12
Verbatim from NTSB's published report. Source file
NTSB_1984_NYC84IA225.txt.
Findings + structured fields enriched from FAA avall.mdb.
Full investigation docket on
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