ASN Wikibase Occurrence # 382754
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| Date: | Saturday 8 January 1983 |
| Time: | 15:00 LT |
| Type: |  Robinson R22 |
| Owner/operator: | Kelaire |
| Registration: | N9017Y |
| MSN: | 0016 |
| Year of manufacture: | 1980 |
| Total airframe hrs: | 1087 hours |
| Engine model: | Lycoming O-320-A2B |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Milford, CT -
 United States of America
|
| Phase: | En route |
| Nature: | Training |
| Departure airport: | Ellington, CT (7B9) |
| Stratford, CT (KBDR) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
THE HELICOPTER COLLIDED WITH A TELEPHONE POLE DURING AN AUTOROTATION FORCED LANDING AFTER AN ENGINE MALFUNCTION. THE AIRCRAFT WAS CRUISING AT 500 FEET WHEN THERE WAS AN AUDIBLE DECREASE IN MAIN ROTOR AND ENGINE RPM. THE ROTOR RPM WAS BETWEEN 80-85 PERCENT WHEN THE INSTRUCTOR PILOT TOOK CONTROL FROM THE STUDENT. DURING AN AUTOROTATIVE LANDING, THE INSTRUCTOR MANEUVERED TO AVOID WIRES WHILE LANDING ON A DOWNHILL STREET, AWAY FROM AUTOMOBILE TRAFFIC. THE AUTOROTATION WAS ALMOST COMPLETE WHEN THE ROTOR STRUCK A TELEPHONE POLE AND ROLLED THE AIRCRAFT ON ITS SIDE. THE LOW RPM WARNING HORN AND CAUTION LIGHT DID NOT WORK AS PROGRAMMED. THE BATTERY TERMINAL WERE FOUND CORRODED AND THE BATTERY VOLTAGE WAS FOUND TO BE LOW. ELECTRICAL WIRE #19 WAS FOUND DISCONNECTED FROM THE ALTERNATOR SWITCH WHERE THE WIRE HAD BEEN SOLDERED TO THE SWITCH. AN EXAMINATION REVEALED THAT THE SOLDER ADHESION WAS GOOD, BUT THE WIRE HAD NOT BEEN PASSED THRU THE TERMINAL POST & WRAPPED BEFORE IT WAS SOLDERED. NO OTHER PREIMPACT MALFUNCTIONS OR FAILURES WERE FOUND.
Probable Cause:
Accident investigation:
 |
|
Sources:
NTSB NYC83FA052
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 02-Apr-2024 17:14 | ASN Update Bot | Added |
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