DCA04IA018

NTSB incident investigation · Embraer 135 · Bangor, MA · January 19, 2004

Incident · No injuriesIncident investigationFinal report
Date
January 19, 2004, 16:20 local (21:20 UTC)
Place
Bangor, MA
Injuries
40 uninjured
Damage
Minor damage
Phase of flight
Initial climb
Aircraft
N734EKEmbraer 135
Weather
Visual (VMC)
Status
Completed · report November 30, 2007
Report
Approved by Office Director
NTSB office
Major Investigations Division
Parties
Headquarters
Case key
58639

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the incident.

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Probable cause

Severe wear of the internal threads of the rudder interconnection contol rod which led to disengagement.

Sequence of events

NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.

Airframe/component/system failure/malfunctionTakeoff - initial climb
Flt control syst,rudder control cable/rod - failureCause
Flt control syst,rudder control cable/rod - wornCause

Analysis

American Eagle Embraer 135, N734EK, experienced an uncommanded rudder deflection after takeoff from Bangor, Maine. The flight crew returned to Bangor and landed the airplane uneventfully. There were 35 passengers and 3 crew members on board. Inspection of the airplane after the incident revealed a failed rudder interconnect rod. Examination of the failed components in the NTSB Materials Lab revealed that the internal threads of the interconnect rod were worn.

Factual narrative

American Eagle Embraer 135, N734EK, experienced an uncommanded rudder deflection after takeoff from Bangor, Maine. The flight crew returned to Bangor and landed the airplane uneventfully. There were 35 passengers and 3 crew members on board. Inspection of the airplane after the incident revealed a failed rudder interconnect rod.

Aircraft

Registration
N734EK
Reported as
Embraer 135
Category
Airplane
Damage
Minor damage
Flight
Part 121
Operator
Simmons Airlines Inc
Departed
KBGR · Bangor, MA
Destination
KBOS · Boston, MA
Flight plan
IFR

Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.

Flight crew · 2

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Injuries
None
Role
Co-pilot
Injuries
None

Weather

Conditions
Visual (VMC)
Wind
290° at 12 knots, gusting 18
Visibility
10 statute miles
Temperature
21 °F, dew point 3 °F
Altimeter
29.21 inHg