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ASN Wikibase Occurrence # 248965
Last updated: 23 November 2021
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Type:Silhouette image of generic B752 model; specific model in this crash may look slightly different
Boeing 757-2B7 (SF)
Owner/operator:Morningstar Air Express
Registration: C-FMHA
MSN: 27146/551
Fatalities:Fatalities: 0 / Occupants: 2
Other fatalities:0
Aircraft damage: None
Location:32 nm E From CYXE -   Canada
Phase: En route
Departure airport:Edmonton International Airport, AB (YEG/CYEG)
Destination airport:Winnipeg-James Armstrong Richardson International Airport, MB (YWG/CYWG)
Investigating agency: TSB Canada
A Boeing 757-200 aircraft operated by Morningstar Air Express Inc., was conducting flight MAL7070 from Edmonton Intl (CYEG), AB, to Winnipeg/James Armstrong Richardson Intl (CYWG), MB. While cruising at FL350 the flight crew received a "Cabin Alt" master warning. The cabin altitude was noted to have risen above 10 000 feet with the outflow valve fully closed. The flight crew declared PAN PAN, and requested a descent to 14 000 feet above sea level. As the aircraft descended through FL230 the flight crew reported normal pressurization and requested FL210. The flight continued to destination without further incident.
The aircraft was operating with an inoperative right-hand air-conditioning pack that had been deferred in accordance with the minimum equipment list (MEL) which restricted operation to a maximum altitude of FL350. However, the aircraft was unable to maintain maximum cabin differential pressure at the flight planned FL350. The next leg of flight MAL7070 was cancelled pending the replacement of the air-conditioning pack and clearing the MEL item.



Other occurrences involving this aircraft

4 Apr 2011 G-OOBI Thomson Airways 0 FL370 about 100nm northwest of Athens, Greece non

Revision history:

21-Mar-2021 15:50 harro Added
21-Mar-2021 15:53 harro Updated [Date, Time, Aircraft type, Cn, Source]

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