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ASN Wikibase Occurrence # 230365
Last updated: 21 September 2021
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Date:15-NOV-2018
Time:
Type:Silhouette image of generic DH8D model; specific model in this crash may look slightly different
de Havilland Canada DHC-8-402Q Dash 8
Owner/operator:Flybe
Registration: G-JECR
MSN: 4139
Fatalities:Fatalities: 0 / Occupants: 39
Other fatalities:0
Aircraft damage: None
Category:Serious incident
Location:Exeter International Airport, Devon -   United Kingdom
Phase: En route
Nature:Passenger - Scheduled
Departure airport:Exeter Airport (EXT/EGTE)
Destination airport:Paris-Charles de Gaulle Airport (CDG/LFPG)
Investigating agency: AAIB
Narrative:
Whilst climbing to FL190 en-route to Paris-Charles de Gaulle Airport, the pilots received an alt mismatch message and they elected to return to Exeter Airport. Following an inspection after landing, a small white crystalline deposit was found covering three of the four static pressure holes on the left primary pitot static probe.

It is probable that the use of a non-approved product, to improve the seal between a test adaptor and the pitot static probe during maintenance immediately prior to this flight, may have resulted in the blockage of the static holes and led to the altitude mismatch message.

The investigation found that a non-approved product was probably used to improve the seal between a testing device and the probe during maintenance immediately before the flight, and this may have resulted in the blockage of the static holes, leading to the altitude mismatch message. Two Safety Recommendations have been made to prevent similar incidents. The maintenance organisation has taken safety action to introduce tighter controls on the test kit equipment.

Sources:

http://aerossurance.com/safety-management/q400-test-kit-wad-wai/
https://www.gov.uk/government/news/aaib-report-dash-8-q400-serious-incident-and-returned-to-exeter

Accident investigation:
cover
  
Investigating agency: AAIB
Status: Investigation completed
Duration: 1 year
Download report: Final report
Other occurrences involving this aircraft

3 Feb 2016 G-JECR Flybe 0 En route, between Birmingham and Aberdeen min
29 Aug 2016 G-JECR FlyBe 0 Birmingham International Airport, Elmdon, Birmingham min

Media:

#OTD 2018 #AAIB safety investigation revealed a difference between 'work as imagined' and 'work as done' in testing the pitot static system. http://aerossurance.com/safety-management/q400-test-kit-wad-wai/ #aviationmaintenance #humanfactors #aviationsafety #flightsafety

Images:

Photo of G-JECR courtesy AirHistory.net


Glasgow - International (EGPF / GLA)
28 May 2019; (c) Lewis Grant

Revision history:

Date/timeContributorUpdates
02-Nov-2019 18:54 harro Added
09-Nov-2019 21:57 Dr. John Smith Updated [Location, Source, Embed code, Narrative]
06-Dec-2019 21:26 Aerossurance Updated [Location, Source, Embed code]
13-Dec-2019 20:18 harro Updated [Source, Accident report, ]
15-Nov-2020 11:14 Aerossurance Updated [Embed code, Accident report]

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