ASN Wikibase Occurrence # 242688
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| Date: | Tuesday 7 March 2017 |
| Time: | 17:34 |
| Type: |  Boeing 737-530 |
| Owner/operator: | LC Perú |
| Registration: | N240AT |
| MSN: | 24824/2006 |
| Year of manufacture: | 1991 |
| Fatalities: | Fatalities: 0 / Occupants: 122 |
| Aircraft damage: | None |
| Category: | Serious incident |
| Location: | 90nm from Cuzco -
 Peru
|
| Phase: | En route |
| Nature: | Passenger - Scheduled |
| Departure airport: | Cuzco-Velazco Astete Airport (CUZ/SPZO) |
| Lima-Jorge Chávez International Airport (LIM/SPJC) | |
| Investigating agency: | CIAA |
| Confidence Rating: |  Accident investigation report completed and information captured |
The Boeing 737-530 took off from the airport of Cusco (SPZO) to the airport of Lima (SPJC). Being on the UM548 airway at cruising altitude FL360, the crew activated the switches to divert air from the Engine Air Bleed Valves to the Anti-Ice System of engines and wings
As a result, they observed that the warning lights for the indicated bleed air valves turned on and the air conditioning packages were disconnected, generating a sudden and rapid depressurization of the aircraft.
The crew arranged for oxygen masks to be dropped to activate the flow of oxygen to the passengers and cabin crew and declared an emergency to effect a descent to safety altitude FL100. Control of cabin pressure was regained and the flight continued their route to Lima, where they landed successfully without personal injury or material damage.
The investigation established as cause, the manual activation of the anti-ice switch of the wings, at an altitude higher than the maximum limit established by the manufacturer BOEING, causing the disconnection of the Bleed Air Valves of the right and left engines and the subsequent disconnection of the air conditioning packages and sudden depressurization of the cabins.
Accident investigation:
 |
|
Sources:
https://cdn.www.gob.pe/uploads/document/file/1298495/N240AT%20%2807MAR17%29.pdf
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 20-Sep-2020 12:28 | harro | Added |
Corrections or additions? ... Edit this accident description
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