ASN Wikibase Occurrence # 32412
This information is added by users of ASN. Neither ASN nor the Flight Safety Foundation are responsible for the completeness or correctness of this information.
If you feel this information is incomplete or incorrect, you can submit corrected information.
| Date: | Friday 25 March 1994 |
| Time: | 14:42 LT |
| Type: |  Bell 206L LongRanger |
| Owner/operator: | Falcon Helicopter Service, Inc |
| Registration: | N16705 |
| MSN: | 4150 |
| Year of manufacture: | 1977 |
| Total airframe hrs: | 11590 hours |
| Engine model: | ALLISON 250-C20B |
| Fatalities: | Fatalities: 0 / Occupants: 7 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Orlando, FL -
 United States of America
|
| Phase: | Initial climb |
| Nature: | Unknown |
| Departure airport: | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
SHORTLY AFTER TAKEOFF, USING WATER/ALCOHOL INJECTION, THE PILOT NOTED THE N2 TURBINE SPEED INDICATION WENT TO THE TOP OF THE GAUGE. HE ROLLED OFF THROTTLE TO REDUCE THE N2 GAUGE READING; AT THE SAME TIME, HE LOOKED FOR A PLACE TO LAND. THE PILOT BELIEVED THERE WAS INSUFFICIENT ALTITUDE FOR AN AUTOROTATION. SUBSEQUENTLY, THE HELICOPTER TOUCHED DOWN HARD & CAME TO REST WITH EXTENSIVE DAMAGE. A POSTACCIDENT EXAM REVEALED NO PREIMPACT FAILURE OF THE AIRFRAME, FLIGHT CONTROLS, OR FUEL SYSTEM. TESTING OF THE WATER/ALCOHOL SOLUTION REVEALED 66.5% METHANOL & 33.5% WATER. SPECIFICATIONS REQUIRED 33.5% METHANOL & 66.5% WATER, BUT ALLISON ENGINE PERSONNEL SAID THE HIGH LEVEL OF METHANOL WOULD NOT HAVE AFFECTED ENGINE PERFORMANCE. DURING A POSTACCIDENT TEST, THE ENGINE OPERATED TO FULL POWER WITH NO EVIDENCE OF FAILURE OR MALFUNCTION. TESTING OF THE ENGINE INSTRUMENTS REVEALED THE N2 GAUGE WAS PROVIDING A FAULTY INDICATION. THE OTHER ENGINE INSTRUMENTS OPERATED NORMALLY AFTER THE ACCIDENT.
Probable Cause: THE PILOT'S FAILURE TO CROSS-CHECK A FAULTY ENGINE SPEED INDICATION WITH OTHER ENGINE PERFORMANCE INDICATIONS TO VERIFY WHETHER AN ENGINE MALFUNCTION HAD ACTUALLY OCCURRED, AND HIS FAILURE TO MAINTAIN ADEQUATE ROTOR RPM DURING AN EMERGENCY LANDING. THE PILOT'S REACTION TO THE PERCEIVED ENGINE MALFUNCTION LED TO AN UNNECESSARY REDUCTION OF ENGINE POWER AND SUBSEQUENT EMERGENCY LANDING.
Accident investigation:
 |
|
Sources:
NTSB MIA94LA100
FAA register: 1. http://registry.faa.gov/aircraftinquiry/NNum_Results.aspx?NNumbertxt=16705
History of this aircraft
Other occurrences involving this aircraft
| 10 August 1986 | N1083Z | [Ems] | 0 | Grangeville, ID | |
w/o |
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 27-Sep-2008 01:00 | ASN archive | Added |
| 23-Jun-2014 23:12 | Dr. John Smith | Updated [Time, Operator, Total fatalities, Total occupants, Other fatalities, Location, Country, Phase, Nature, Departure airport, Source, Damage, Narrative] |
| 10-Apr-2024 08:21 | ASN Update Bot | Updated [Time, Cn, Operator, Other fatalities, Phase, Nature, Departure airport, Source, Damage, Narrative, Category, Accident report] |
Corrections or additions? ... Edit this accident description
The Aviation Safety Network is an exclusive service provided by:
Quick Links:
| ASN Home | Send Correction / Feedback |
| FSF Home | Disclaimer | Copyright |
| Contact Us | Privacy Policy |
| Press / Media |
CONNECT WITH US:
©2024 Flight Safety Foundation