DEN89IA067

NTSB incident investigation · Boeing 707-323B · Salt Lake City, UT · January 22, 1989

Incident · No injuriesIncident investigationFinal report
Date
January 22, 1989, 09:49 local (16:49 UTC)
Place
Salt Lake City, UT
Injuries
194 uninjured
Damage
Minor damage
Phase of flight
Approach
Aircraft
N712PCBoeing 707-323B
Weather
Instrument (IMC) · Day
Status
Completed · report August 26, 1992
Report
Approved by Office Director
FAA report
19890122010139I
Case key
17615

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

The pilot-in-command's attempt to align the airplane with the runway at an altitude insufficient for safe maneuvering, resulting in the no. 1 engine striking the runway. Contributing factors include obscured visibility due to fog, the captain's loss of depth perception, and pilot fatigue due to disrupted circadian rhythm.

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.

Abrupt maneuverApproach - faf/outer marker to threshold (ifr)
Weather condition - obscurationFactor
Weather condition - fogFactor
Missed approach - not performedPilot in commandFactor
Proper alignment - attemptedPilot in commandCause
Altitude - inadequatePilot in commandFactor
Fatigue(circadian rhythm)Pilot in commandFactor
Dragged wing,rotor,pod,float or tail/skidLanding - flare/touchdown
Touchdown - improperPilot in commandCause

Analysis

Plt was executing category I ILS apch to rwy 34L after flying from hon to slc. Plt said he 'came off gauges' at 300 ft AGL expecting to see rwy but didn't. at 200 ft AGL, he saw rwy 150 ft to left but lost all depth perception. Plt considered executing missed apch but felt he could align acft with rwy with alt remaining. While maneuvering, no. 1 eng struck rwy, leaving 50-60 ft long, 1-inch deep gouge. In previous 30 hr period, plt had been on duty 18 hrs, 30 min, and had flown 13 hrs, 25 min. He had been off duty 11 hrs, 24 min, but had slept only 1 hr.

Aircraft

Registration
N712PC
Reported as
Boeing 707-323B
Category
Airplane
Serial number
20176
Airframe hours
45,804
Engine
P&W JT3D-38, 18,000 lbs thrust, turbo fan
Damage
Minor damage
Flight
Part 121
Registered owner
Ports Of Call Air
Airworthiness certificate
Standard, Transport
Last inspection
Continuous airworthiness · January 29, 1989 · 29 hours before
Departed
HNL · Honolulu, HI
Destination
SLC
Flight plan
IFR
Airport
SLC · Salt Lake City, runway 34L, 12,003 × 150 ft, asphalt

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

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
56
Certificates
Commercial, Airline transport
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 1, Valid Medical--no waivers/lim.
Seat
Left
Flight hours
16,800 total · 4,390 in this make and model · 9,600 as pilot in command

Weather

Conditions
Instrument (IMC) · Day
Wind
350° at 6 knots
Lowest ceiling
25,000 ft overcast
Temperature
23 °F, dew point 21 °F
Altimeter
29.00 inHg
Observed at
SLC

FAA reports on this event · 1

The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.

Other investigations on N712PC · 1

Matched to the same aircraft by N-number and date.