LAX87IA027

NTSB incident investigation · Boeing 727-222 · Los Angeles, CA · October 29, 1986

Incident · No injuriesIncident investigationFinal report
Date
October 29, 1986, 11:09 local (19:09 UTC)
Place
Los Angeles, CA
Injuries
73 uninjured
Phase of flight
Approach
Aircraft
N7255UBoeing 727-222N8620FHughes 369D
Weather
Visual (VMC) · Day
Status
Completed · report July 19, 1988
Report
Approved by Office Director
Case key
25432

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.

Near collision between aircraftApproach - iaf to faf/outer marker (ifr)
Flight/nav instruments,altimeter - leakCause
Altitude - excessivePilot of other aircraftCause
Near collision between aircraftHover
Flight/nav instruments,altimeter - leakCause
Altitude - excessivePilot in commandCause

Analysis

Drg arr, united flt 282 (Boeing 727, N7255U) was vectored by Los Angeles (lax) TRACON for an ILS rwy 25L apch. While in a dscndg turn at 2100' MSL to intercept the ILS LOC at 2000', the capt saw a helicopter (hel) ahead & pulled up. He estdhis acft passed w/i 200' to 300' of the hel. The hel was a dea acft (Hughes 369D, N8620F) on a surveillance flt. The deaplt said he was hovering blo the lax terminal ctl area (tca) when he saw the Boeing make a rgt turn twd the lax arpt. He said the Boeing was in his view for the entire time & it was not a hazard to him, but he was concerned about its low alt. Later, he adzd lax twr. The dea plt stated he was operg btn 1400' & 1900' & that the hel was at 1300' when the Boeing converged. He estd the Boeing crossed 300' to 400' abv the hel. Radar data indcd the 2 acft converged to a slant range of 1500'. Min vert sepn was 200'. Radar data also indcd that flt 282 remained abv the tca floor (2000') & that the hel was blo the tca. A leak was fnd in the hel's pitot static sys, which caused an undetermined error.

Aircraft · 2

Registration
N7255U
Reported as
Boeing 727-222
Category
Airplane
Serial number
21402
Engine
P&W JT8D, 14,500 lbs thrust, turbo fan
Damage
No damage
Flight
Part 121
Registered owner
United Airlines
Airworthiness certificate
Standard, Transport
Departed
MRV · Monterey, CA
Destination
LAX
Flight plan
IFR
Airport
runway 25L, 11,096 × 200 ft, concrete

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.

Registration
N8620F
Reported as
Hughes 369D
Category
Helicopter
Serial number
70160D
Airframe hours
3,000
Engine
Allison 250-C20B, 375 horsepower, turbo shaft
Damage
No damage
Flight
Public aircraft · Part 91
Registered owner
Dept Of Justice, Dea
Airworthiness certificate
Standard, Normal
Last inspection
100 hour · May 30, 1986 · 90 hours before
Departed
TOA · Torrence, CA

Flight crew · 2

As NTSB recorded them. NTSB leaves out names.

Role
Pilot, aircraft N7255U
Age
49
Certificates
Flight engineer, Airline transport
Airplane ratings
Multi-engine land, Single-engine land
Instrument ratings
Airplane
Medical
Class 1, Valid Medical--w/ waivers/lim
Seat
Left
Flight hours
10,000 total · 5,000 in this make and model · 7 in the last 24 hours
Role
Pilot, aircraft N8620F
Age
43
Certificates
Airline transport, Commercial
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane, Helicopter
Medical
Class 1, Valid Medical--no waivers/lim.
Seat
Left
Flight hours
6,000 total · 1,100 in this make and model · 119 in the last 90 days · 80 in the last 30 days · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
220° at 8 knots
Visibility
3 statute miles
Lowest ceiling
None
Temperature
73 °F, dew point 57 °F
Altimeter
30.00 inHg
Observed at
LAX, 11 nm away

Other investigations on N7255U · 1

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