Date:	Wednesday 1 May 2024
Time:	c .15:00
Type:	Piper PA-31 Navajo C
Owner/operator:	Field Group Aviation AS
Registration:	LN-NAB
MSN:	31-8012029
Year of manufacture:	1980
Total airframe hrs:	15680 hours
Fatalities:	Fatalities: 0 / Occupants: 3
Other fatalities:	0
Aircraft damage:	Minor, repaired
Category:	Serious incident
Location:	near Västerås-Hasslo Airport (VST/ESOW) -   Sweden
Phase:	Approach
Nature:	Survey
Departure airport:	Västerås-Hasslo Airport (VST/ESOW)
Destination airport:	Västerås-Hasslo Airport (VST/ESOW)
Investigating agency:	SHK
Confidence Rating:	Accident investigation report completed and information captured

Narrative:
A commercial flight with a Piper PA-31-310 aircraft was operated for the purpose of perform­ing a three-dimensional scan east of Stockholm. Take-off and landing were intended to be carried out at Stockholm/Västerås Airport. During the final phase of the flight, a fuel exhaus­tion caused dual engine failures, which led to an emergency landing in a field in the vicinity of the airport. The landing caused structural damage to the left wing. There were no injuries to the persons onboard.

The technical investigation has shown that the fuel gauges indicated unreliable values, and that there was no remaining usable fuel. The operator's fuel management and planning for the duration of the mission proved inadequate. Following the accident, the operator has introduced measures to improve fuel measurement and documentation, including increased requirements for fuel reserve and annual calibration of the fuel gauges.

Causes
The accident was the result of a number of factors which together caused the engines to fail due to fuel exhaustion, resulting in an emergency landing.

Shortcomings in planning, implementation and follow-up within the operator's operations contributed to the risks of such a situation not being managed in an appropriate manner.

Contributing factors:

Absence of accurate fuel consumption data.
Prerequisites were lacking to establish a sufficiently detailed operational flight plan.
The fuel gauges indicated unreliable values.
The operator's safety management system had not fully addressed the specific chal­lenges and risks posed by the operation.

https://www.expressen.se/nyheter/sverige/flygplan-fick-nodlanda-vid-vasteras-flygplats/
https://www.instagram.com/p/C6bZU5zodTa/?igsh=MWF5MndyejhsanV4bQ==

https://www.flightradar24.com/data/aircraft/ln-nab#35029596

https://cdn.jetphotos.com/full/5/76075_1403314805.jpg (photo)

Ex OY-BYJ, PH-URI, N1002W, PH-URI, N3552V

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Date/time	Contributor	Updates
01-May-2024 15:56	snyggtratt	Added
01-May-2024 15:57	ASN	Updated [Aircraft type, Total fatalities, Nature, Destination airport, Embed code, Narrative, ]
01-May-2024 15:59	ASN	Updated [Time, Aircraft type, Location, Phase, Destination airport, Source, Embed code, Narrative, ]
01-May-2024 16:08	ASN	Updated [Aircraft type, Registration, Cn, Total occupants, Phase, Nature, Source, Damage, Narrative, ]
01-May-2024 16:30	RobertMB	Updated [Aircraft type, Operator, Departure airport, Destination airport, Source, Narrative, ]
02-May-2024 06:46	Anon.	Updated [Narrative, ]
23-Apr-2025 12:56	ASN	Updated [Damage, Narrative, Accident report, ]