# NTSB ENG15RA023: Boeing 400, Islamabad, Pakistan, Pakistan, April 21, 2015

- Type: NTSB incident investigation
- Classification: Incident · No injuries · Foreign investigation
- Date: April 21, 2015, 05:37 local (05:37 UTC)
- Place: Islamabad, Pakistan, Pakistan
- Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping)
- Defining event: [Initial climb: Loss of engine power (partial)](https://openairdocs.org/ntsb-events/342)
- Highest injury: No injuries
- Status: Led by another country's authority
- NTSB office: Aviation Engineering Division
- Lead agency: Other
- NTSB case key (mKey): 91271
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ENG15RA023
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/91271/pdf
- Page: https://openairdocs.org/ntsb/ENG15RA023

## Sequence of events

The events NTSB coded, in order, by phase of flight. The defining event best describes what happened.

- [Initial climb: Loss of engine power (partial)](https://openairdocs.org/ntsb-events/342) (defining event); cases with it: [All aircraft, 1,858 cases](https://openairdocs.org/ntsb-events/342/sequence.md)

## Factual narrative

On April 21, 2015, a Shaheen Air International (SAI) Boeing 737-400, powered by CFMI CFM56-3C1 turbofan engines, experienced a No. 1 (left engine) failure while climbing through 3,200 feet. The flight crew heard a loud band and high exhaust gas temperature was observed for the No. 1 engine. The engine was shutdown and the airplane was turned back for a successful single engine landing at the Islamabad International Airport (OPRN). The investigation is being conducted by the Pakistan Civil Aviation Authority (PCAA). The NTSB is participating as the US Accredited Representative as the state of manufacturer for the engines. The PCAA can be contacted at psib@caapakistan.com.pk or by phone at (92) 21 9924 2772.

## Aircraft

- Registration: AP-BJT (not matched to a registry record)
- Reported make and model: BOEING 400
- Category: Airplane
- Serial number: 25740
- Engines: CFM CFM56-3C1 turbo fan
- Damage: No damage
- Airworthiness certificate: Standard, Transport

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

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