- Date
- January 26, 1969
- Place
- Tyonek, AK · TYONEK, AK
- Injuries
- 2 fatal
- Damage
- Destroyed
- Phase of flight
- Uncontrolled descent
- Aircraft
- N4048GBell 205A
- Status
- Completed · report September 2, 1969
- Report
- Brief approved by the director
- Case key
- 191254
From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.
On this page
NTSB brief
NTSB’s brief of the accident, as it was printed: the coded facts, with the probable cause and factors.
---------------------------------------------------------------------------------------------------------------------------- FILE DATE LOCATION AIRCRAFT DATA INJURIES FLIGHT PILOT DATA F S M/N PURPOSE ---------------------------------------------------------------------------------------------------------------------------- 3-2144 69/1/26 NR.TYONEK,ALAS BELL 205A CR- 1 0 0 COMMERCIAL COMMERCIAL, AGE 26, 2165 TIME - 1243 N4048G PX- 1 0 0 AIR TAXI-PASSG TOTAL HOURS, 2122 IN DAMAGE-DESTROYED OT- 0 0 0 TYPE, NOT INSTRUMENT RATED. TYPE OF ACCIDENT PHASE OF OPERATION COLLISION WITH GROUND/WATER: UNCONTROLLED IN FLIGHT: UNCONTROLLED DESCENT PROBABLE CAUSE(S) SYSTEMS - FLIGHT CONTROL SYSTEMS: FLIGHT CONTROL BOOST SYSTEMS, HYDRAULIC ROTORCRAFT - FLIGHT CONTROL SYSTEMS: CYCLIC PITCH CONTROL SYSTEM ROTORCRAFT - FLIGHT CONTROL SYSTEMS: COLLECTIVE PITCH CONTROL SYSTEM MISCELLANEOUS ACTS,CONDITIONS - IMPROPER/INADEQUATE VENTING MISCELLANEOUS ACTS,CONDITIONS - JAMMED WEATHER - ICING CONDITIONS-INCLUDES SLEET,FREEZING RAIN,ETC. PERSONNEL - PRODUCTION-DESIGN-PERSONNEL: POOR/INADEQUATE DESIGN FACTOR(S) MISCELLANEOUS ACTS,CONDITIONS - AIRCRAFT CAME TO REST IN WATER WEATHER BRIEFING - NO RECORD OF BRIEFING RECEIVED WEATHER FORECAST - UNKNOWN/NOT REPORTED SKY CONDITION CEILING AT ACCIDENT SITE CLEAR UNLIMITED VISIBILITY AT ACCIDENT SITE PRECIPITATION AT ACCIDENT SITE 5 OR OVER(UNLIMITED) NONE OBSTRUCTIONS TO VISION AT ACCIDENT SITE TEMPERATURE-F NONE 15 TYPE OF WEATHER CONDITIONS TYPE OF FLIGHT PLAN VFR NONE REMARKS- MOISTURE IN SERVO CYL VENT PORTS FROZE,PILOT VALVES BELOW PORTS BECAME INOP CAUSED CONTROL LOCK-UP
Aircraft
- Registration
- N4048G
- Reported as
- Bell 205A
- Category
- Helicopter
- Engine
- turbo shaft
- Damage
- Destroyed
Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.