# NTSB CHI83IA269: Boeing B-747, N4717U, Chicago, IL, June 20, 1983

- Type: NTSB incident investigation
- Classification: Incident · No injuries · Incident investigation · Final report
- Date: June 20, 1983, 11:29 local (16:29 UTC)
- Place: Chicago, IL
- Location: 41.9769° N, 87.9081° W: Placed by OpenAirDocs at CHICAGO O'HARE INTL (ORD), within about a mile (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=41.9769&lon=-87.9081&mi=10
- Phase of flight: [Standing](https://openairdocs.org/ntsb-phases/150) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 440 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 12049
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI83IA269
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/12049/pdf
- Page: https://openairdocs.org/ntsb/CHI83IA269

## Sequence of events

In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf).

- On ground/water collision with object, standing - engine(s) operating
  - object - aircraft moving on ground (contributing factor)
  - clearance - misjudged, flight engineer (cause)
- On ground/water collision with object, taxi - to takeoff
  - object - aircraft parked/standing (contributing factor)
  - clearance - misjudged, other person (cause)

## Analysis (aircraft 2)

THE UNITED AIRLINES B747 WAS STANDING IN THE RUN UP AREA ADJACENT TO THE RUNWAY. A FLYING TIGERS B747 WAS PASSING TO HIS LEFT. THE CREW OF THE PARKED B747 OPENED THEIR OVERHEAD ESCAPE HATCH AND INDICATED TO THE TAXIING B747 WITH A THUMBS UP SIGN THAT THERE WAS ADEQUATE CLEARANCE. THE TAXIING B747 THEN PROCEEDED FORWARD AND HIT THE NOSE AREA OF THE PARKED B747 WITH THEIR RIGHT WING TIP. BOTH ACFT THEN TAXIED BACK TO THE RAMP WITHOUT FURTHER INCIDENT.

## Aircraft 1

- Registration: [N4717U](https://openairdocs.org/deregistered/N4717U-1998-02-12), registration cancelled 1998-02-12, S/N 19878 (OpenAirDocs)
- Reported make and model: BOEING B-747
- Registry model: [Boeing 747-122](https://openairdocs.org/model/boeing-747-122) (registry code 1384872) (OpenAirDocs)
- Category: Airplane
- Engines: P&W JT9D turbo fan
- Damage: Minor damage
- Flight: Part 121
- Registered owner: United Airlines
- Airworthiness certificate: Standard, Transport
- Destination: HNL, HONOLULU, HI
- Flight plan: IFR
- Airport: ORD, O'Hare

## Aircraft 2

- Registration: N808FT (not matched to a registry record)
- Reported make and model: BOEING B-747
- Category: Airplane
- Engines: P&W JT9D turbo fan
- Damage: Minor damage
- Flight: Part 121
- Registered owner: Flying Tigers
- Airworthiness certificate: Standard, Transport
- Destination: ANC, ANCHORAGE, AK
- Flight plan: IFR
- Airport: ORD, O'Hare

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot, aircraft N4717U; airline transport; airplane ratings: multi-engine land; instrument ratings: airplane; medical: unknown, unknown; seat: left
- Pilot, aircraft N808FT; age 42; airline transport; airplane ratings: multi-engine land; instrument ratings: airplane; medical: class 1, valid medical--no waivers/lim.; seat: left; flight hours: 7,606 total, 1,330 in this make and model, 19 in the last 30 days, 1 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 120° at 6 knots
- Visibility: 4 statute miles
- Lowest ceiling: none
- Temperature: 73 °F, dew point 64 °F
- Altimeter: 30.00 inHg
- Observed at: ORD

## FAA reports on this event (2)

The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs).

- [Incident 19830620076152I](https://openairdocs.org/incident/19830620076152I), Jun 20, 1983: Boeing 747122, Chicago, IL, Minor damage. Struck by N808FT a 747 while holding at takeoff run up pad.
- [Incident 19830620035399I](https://openairdocs.org/incident/19830620035399I), Jun 20, 1983: Boeing 747249F, Chicago, IL, Minor damage. Right wing tip struck a parked ual 747 while taxing. Damaged the 747 s radome.

## Other investigations on N4717U (1)

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [NTSB CHI76IC005](https://openairdocs.org/ntsb/CHI76IC005), Jul 17, 1975: Boeing 747 (N4717U), Chicago, IL, incident, minor damage

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

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