# NTSB Incident ENG09IA011
> **BOEING 737** · 2009-06-14 · Diyarbakir, OF, TU · MINR
## Event
- **NTSB number:** ENG09IA011
- **Event ID:** 20090826X84257
- **Type:** Incident
- **Date:** 2009-06-14
- **Location:** Diyarbakir, OF, TU
- **Coordinates:** 37.892619, 40.199837
## Injuries
- **Highest injury:** MINR
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 2
- **Uninjured:** 0
- **Total aboard:** 2
## Aircraft
- **Make:** BOEING
- **Model:** 737
- **Registration:** TC-TLA
- **FAR Part:** NUSC
- **Engines:** 2
- **Damage:** —
## Conditions
- **Light:** NR
- **Weather:** VMC
## Probable cause

An uncommanded elevator surface deflection as a result of a left elevator PCU input arm assembly jam due to FOD lodged between the input arm assembly and the PCU housing. The FOD was a roller element from an elevator upper torque tube output crank bearing, but how or when the roller element liberated from its bearing assembly could not be determined.  Contributing to the survivability of this incident was the flight crew’s immediate actions in response to the elevator control system jam.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=ENG09IA011) · AI Analytics · CC0 1.0*