ASN Wikibase Occurrence # 360924
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| Date: | Sunday 16 January 1994 |
| Time: | 00:20 LT |
| Type: |  Robinson R22B |
| Owner/operator: | Initiative Trade Corp. |
| Registration: | N193HC |
| MSN: | 1924 |
| Year of manufacture: | 1991 |
| Total airframe hrs: | 442 hours |
| Engine model: | LYCOMING O-320-B2C |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Gurabo -
 Puerto Rico
|
| Phase: | En route |
| Nature: | Unknown |
| Departure airport: | |
| San Juan, PR (KSIG) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
THE PILOT STATED THAT DURING CRUISE FLIGHT DURING A DARK NIGHT OVER UNSUITABLE TERRAIN AT 1,800 FEET MSL, THE CLUTCH LIGHT FLICKERED MOMENTARILY THEN REMAINED ILLUMINATED. HE WAITED FOR 5 SECONDS THEN PULLED THE CLUTCH CIRCUIT BREAKER AND INITIATED AN EMERGENCY DESCENT FOR A FORCED LANDING. WHEN THE FLIGHT WAS ABOUT 50 FEET ABOVE GROUND LEVEL (AGL) THE PILOT INITIATED THE CYCLIC FLARE. THEN WHEN THE FLIGHT WAS ABOUT 10 FEET AGL, HE PULLED COLLECTIVE CONTROL BUT THE HELICOPTER LANDED HARD. EXAMINATION OF THE HELICOPTER REVEALED THAT ONE OF THE TWO VEE- BELTS HAD COMPLETELY SEPARATED AND 1/2 OF THE REMAINING BELT HAD ALSO COMPLETELY SEPARATED. REVIEW OF THE MAINTENANCE RECORDS REVEALED THAT THE TENSION OF THE BELTS WAS CHECKED ABOUT 42 HOURS BEFORE. THE VEE-BELTS WERE INSTALLED WHEN THE HELICOPTER WAS MANUFACTURED ABOUT 442 HOURS BEFORE THE ACCIDENT.
Probable Cause: COMPLETE SEPARATION OF ONE OF THE TWO VEE-BELTS, AND COMPLETE SEPARATION OF 1/2 OF THE REMAINING BELT. CONTRIBUTING TO THE ACCIDENT WAS THE DARK NIGHT CONDITION AND UNSUITABLE TERRAIN ENCOUNTERED DURING THE AUTOROTATIVE LANDING.
Accident investigation:
 |
|
Sources:
NTSB MIA94LA054
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 16-Mar-2024 12:40 | ASN Update Bot | Added |
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