Date:	Sunday 7 April 2024
Time:	14:27
Type:	Cessna 172P Skyhawk
Owner/operator:	Sand Air
Registration:	PH-SEL
MSN:	17274194
Year of manufacture:	1980
Fatalities:	Fatalities: 0 / Occupants: 2
Other fatalities:	0
Aircraft damage:	None
Category:	Serious incident
Location:	near Sommelsdijk -   Netherlands
Phase:	En route
Nature:	Training
Departure airport:	Rotterdam/The Hague Airport (RTM/EHRD)
Destination airport:	Rotterdam/The Hague Airport (RTM/EHRD)
Investigating agency:	Dutch Safety Board
Confidence Rating:	Accident investigation report completed and information captured

Narrative:
The Cessna 172P was carrying out a VFR training flight from Rotterdam The Hague Airport (EHRD) with an instructor and student on board. Approximately 45 minutes into the flight, the student initiated a descent to 2,000 feet in the direction of EHRD. Just before the aircraft reached that height, the red low voltage light came on, after which the displays for the
radios and transponder failed. Some smoke came out of the centre console where these instruments are located. The
reading on the oil temperature gauge was high, with the pointer in the red zone. The instructor activated the Emergency Locator Transmitter and decided to make a precautionary landing in a meadow. After she turned off the main switch, the smoke disappeared. The landing was without incident.
An inspection by a maintenance company revealed that an alternator failure had occurred, causing the voltage in the
on-board system to be too high. As a result, a number of units failed. The smoke and a pungent smell were caused by
one of the units becoming hot. The oil temperature gauge incorrectly showed too high a value. The voltage regulator,
which serves as a protective device, did not switch off the system. The maintenance company was unable to identify
the cause of this. The voltage regulator and a few other parts were replaced, after which the fault did not re-occur.

Own observation, talking to PIC
https://www.flightradar24.com/data/aircraft/ph-sel#34ab913f
https://onderzoeksraad.nl/onderzoek/voorzorgslanding-na-rook-in-cockpit-cessna-172p-sommelsdijk/

Ex (PH-SCW), N6409K

Sommelsdijk, 2024-04-07 14:33Z

A Cessna 172-P made an emergency landing in a field near Middelharnis The Netherlands #cessna #Emergency #plane #planespotting #sommelsdijk #middelharnis pic.twitter.com/iVxs0XSEmT

— WANSZOON (@Wanszoon) April 7, 2024

Date/time	Contributor	Updates
07-Apr-2024 15:50	pietert	Added
07-Apr-2024 15:53	ASN	Updated [Aircraft type, Cn, Source, Narrative, ]
07-Apr-2024 15:55	ASN	Updated [Operator, ]
07-Apr-2024 17:42	ASN	Updated [Embed code, ]
08-Apr-2024 07:59	ASN	Updated [Cn, Embed code, ]
09-Apr-2024 21:24	RobertMB	Updated [Time, Location, Destination airport, Damage, Narrative, ]
09-Jul-2024 08:00	Ticcie	Updated [Nature, Source, Narrative, ]
23-Aug-2024 07:39	ASN	Updated [Narrative, Accident report, ]