ASN Wikibase Occurrence # 248965
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| Date: | Wednesday 3 March 2021 |
| Time: | |
| Type: |  Boeing 757-2B7 (SF) |
| Owner/operator: | Morningstar Air Express |
| Registration: | C-FMHA |
| MSN: | 27146/551 |
| Year of manufacture: | 1993 |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | None |
| Location: | 32 nm E From CYXE -
 Canada
|
| Phase: | En route |
| Nature: | Cargo |
| Departure airport: | Edmonton International Airport, AB (YEG/CYEG) |
| Winnipeg-James Armstrong Richardson International Airport, MB (YWG/CYWG) | |
| Investigating agency: | TSB |
| Confidence Rating: |  Information verified through data from accident investigation authorities |
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.
Sources:
TSB
https://flightaware.com/live/flight/MAL7070/history/20210304/0230Z/CYEG/CYWG
History of this aircraft
Other occurrences involving this aircraft
| 4 April 2011 | G-OOBI | Thomson Airways | 0 | FL370 about 100nm northwest of Athens, Greece |  |
non |
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 21-Mar-2021 15:50 | harro | Added |
| 21-Mar-2021 15:53 | harro | Updated [Date, Time, Aircraft type, Cn, Source] |
Corrections or additions? ... Edit this accident description
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