NYC82IA137

NTSB incident investigation · Boeing 727-233 · Flushing, NY · July 5, 1982

Incident · No injuriesIncident investigationFinal report
Date
July 5, 1982, 13:59 local (17:59 UTC)
Place
Flushing, NY
Injuries
74 uninjured
Damage
Minor damage
Phase of flight
Enroute
Aircraft
CGAAABoeing 727-233
Weather
Visual (VMC) · Day
Status
Completed · report July 5, 1983
Report
Approved by Office Director
Case key
70693

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

On this page

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/malfunctionClimb - to cruise
Flight control,leading edge flap attachment - fatigueCause
Maintenance,lubrication - inadequateCompany maintenance personnelCause
Flight control,leading edge flap - movement restricted

Analysis

During initial climb, the amber leading edge flat light remained lit after flap retraction from 5 degrees to 2 degrees. Moderate aileron and rudder inputs were required to maintain wings level flight. After cycling the flaps from 5 back to 2 degrees, the same condition existed and the second officer confirmed that the no. 7 slat was not retracting. The flaps were then extended to 15 degrees, eliminating the rolling tendency, and the flight returned to laguardia. Subsequent inspection revealed that an inboard slat track roller support bolt for the no. 7 slat had failed. The roller was found lodged between the inboard track and wing structure. The roller was seized with several bearings missing. Little lubrication was evident. The bolt fractured through a lubrication hole that the roller mounts over. Bolt fracture faces exhibited striations and cupping. Total time on bolt and roller was 18,815 hours.

Aircraft

Registration
CGAAA
Reported as
Boeing 727-233
Category
Airplane
Serial number
20932
Airframe hours
18,816
Engine
P & W JT8D-15, 15,500 lbs thrust, turbo fan
Damage
Minor damage
Flight
Part 129
Operator
Air Canada
Registered owner
Air Canada
Departed
LGA · Flushing, NY
Destination
CYUL · Montreal
Flight plan
IFR
Airport
LGA · Laguardia, runway 22, 7,000 × 150 ft, asphalt

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
41
Certificate
Airline transport
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Unknown, Valid Medical--no waivers/lim.
Flight hours
10,076 total · 1,558 in this make and model

Weather

Conditions
Visual (VMC) · Day
Wind
170° at 17 knots
Visibility
15 statute miles
Temperature
171 °F
Altimeter
30.00 inHg
Observed at
LGA