# NTSB NYC84FA240: MBB BO-105C, N105CP, Rehobeth, MA, July 15, 1984

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Field investigation · Final report
- Date: July 14, 1984, 22:50 local (Jul 15, 1984, 02:50 UTC)
- Place: Rehobeth, MA
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 2 fatal, 2 serious
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 35356
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=NYC84FA240
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/35356/pdf
- Page: https://openairdocs.org/ntsb/NYC84FA240

## Sequence of events

In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf).

- Loss of engine power(total) - nonmechanical, cruise - normal
  - warning system(other) - disconnected (contributing factor)
  - fuel boost pump selector position - improper, pilot in command (cause)
  - fluid,fuel - starvation (cause)
  - fuel system - improper use of, pilot in command (cause)
  - aircraft performance,two or more engines - inoperative
- Forced landing, landing
  - autorotation - performed, pilot in command
- In flight collision with object, landing - flare/touchdown
  - light condition - night (contributing factor)
  - object - wire,transmission (contributing factor)

## Analysis

THE MESSERSCHMITT-BLOHM-BOELKOW BO-105C WAS ON AN AIR AMBULANCE FLT WITH A PLT, 2 ADDITIONAL CREWMEMBERS (DOCTOR & NURSE) & A PASSENGER (PATIENT) ON BOARD. DURING FLT, THE PLT RADIOED THAT HE HAD LOST POWER IN 1 ENG, THEN ABOUT 14 SEC LATER, HE RADIOED THAT THE OTHER ENG HAD ALSO LOST POWER. DURING A FORCED LANDING/AUTOROTATION TO A ROAD AT NIGHT, THE HELICOPTER COLLIDED WITH POWER LINES & CRASHED. NO FUEL WAS FOUND IN THE RIGHT SUPPLY TANK & ONLY ABOUT 1 GAL OF FUEL WAS FOUND IN THE LEFT SUPPLY TANK. THE MAIN TANK HAD 15.4 GAL REMAINING, BUT THE RESPECTIVE FUEL BOOST PUMP SWITCHES WERE FOUND IN THE 'OFF' POSITION. THE REAR MAIN FUEL TANK HAD ONLY SLIGHTLY OVER 1 GAL REMAINING. ALSO, AN ELECTRICAL WIRE IN THE LOW FUEL WARNING CIRCUIT WAS NOT CONNECTED. THE FUEL SUPPLY TO EACH ENG IS FROM THE FUEL SUPPLY TANKS, WHICH ARE INDEPENDENT OF EACH OTHER.

## Aircraft

- Registration: N105CP (not matched to a registry record)
- Reported make and model: MBB BO-105C
- Category: Helicopter
- Serial number: S190
- Airframe hours: 2722
- Engines: ALLISON 250-C20B 420 horsepower turbo shaft
- Damage: Destroyed
- Flight: Part 135
- Registered owner: Omni Flight Airways Inc.
- Airworthiness certificate: Standard, Normal
- Last inspection: 100 hour, June 14, 1984, 57 hours before
- Departed: MVY, MARTHA'S VINEYD, MA
- Destination: ORH, WORCESTER, MA
- Airport: MVY, Marthas Vineyard

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 35; airline transport; instrument ratings: helicopter; medical: class 1, valid medical--no waivers/lim.; seat: right; toxicology performed; flight hours: 4,728 total

## Weather

- Conditions: Visual (VMC), Night/bright
- Wind: 260° at 9 knots
- Visibility: 10 statute miles
- Lowest ceiling: none
- Temperature: 75 °F, dew point 64 °F
- Altimeter: 30.00 inHg
- Observed at: PVD

## FAA reports on this event (1)

The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs).

- [Accident 19840714040609A](https://openairdocs.org/incident/19840714040609A), Jul 14, 1984: Bolkms BO105C, Rehoboth, MA, Destroyed, 1 fatal. Failed to run main tank pumps, supply tanks ran dry, wire to left low fuel transmitter disconnected.

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.