# NTSB MIA88IA168: Piper PA-42-720, N900MP, Chicago, IL, May 11, 1988

- Type: NTSB incident investigation
- Classification: Incident · No injuries · Incident investigation · Final report
- Date: May 11, 1988, 15:18 local (20:18 UTC)
- Place: Chicago, IL
- Coordinates: 41.87046, -87.649261 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=41.8705&lon=-87.6493&mi=10
- Phase of flight: [Approach](https://openairdocs.org/ntsb-phases/500) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 274 uninjured
- Status: Completed, report July 18, 1990
- Report: Approved by Office Director
- NTSB case key (mKey): 32060
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MIA88IA168
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/32060/pdf
- Page: https://openairdocs.org/ntsb/MIA88IA168

## Sequence of events

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

- Near collision between aircraft, approach
  - miscellaneous - delayed, pilot in command
  - crew/group coordination - inadequate, atc personnel(lcl/gnd/clnc) (cause)
  - atc clearance - improper (cause)
  - ifr separation standards - not maintained, atc personnel(dep/apch) (cause)
- Near collision between aircraft, climb - to cruise
  - miscellaneous - delayed, pilot in command
  - crew/group coordination - inadequate, atc personnel(lcl/gnd/clnc) (cause)
  - atc clearance - improper (cause)
  - ifr separation standards - not maintained, atc personnel(dep/apch) (cause)

## Analysis (aircraft 2)

CONDOR FLT 610 (MCDONNELL DOUGLAS DC-10, GERMAN REGISTRATION: DADSO) WAS APRX 2 HRS LATE AS THE FLT CREW MEMBERS WERE PREPARING TO TAKEOFF. SUBSEQUENTLY, FLT 610 WAS CLRD FOR TAKEOFF WITH INSTRUCTIONS TO CROSS THE 5 DME (ON THE STANDARD INSTRUMENT DEPARTURE/SID) AT OR ABOVE 3000 FT. THE TAKEOFF CLNC WAS THEN CANCELED, BUT WAS REISSUED ABOUT 1 MIN LATER WITH THE SAME RESTRICTIONS. AT ABT THAT TIME, THE FLT WAS EXACTLY 2 HRS OVERDUE & THE COMPUTER DROPPED THE FLT PLAN DATATAG & BLOCK (AS PROGRAMMED TO HANDLE OVERDUE/UNUSED FLT PLANS). AFTER TAKEOFF, FLT 610 CONTACTED DEPARTURE CTL. THE CTLR NOTED ONLY A PRIMARY TRANSPONDER TARGET & OBSERVED NO ALT DATA. MEANWHILE, PIPER PA-42, N900MP, WAS ON AN IFR ARRIVAL FOR A VISUAL APCH TO PAL-WAUKEE ARPT AT 2800 FT. SUBSEQUENTLY, THE TWO ACFT CONVERGED & PASSED WITH ABOUT 2 MI (HORIZONTAL) & 200 FT (VERTICAL) SEPN. INTERVIEWS WITH THE CTLRS REVEALED THEY HAD INTENDED FLT 610 TO CLIMB TO 5000 FT AS PROVIDED BY THE SID. THE ERROR WAS NOT NOTED (WITH THE DATA TAG DROPPED FROM THE COMPUTER).

## Aircraft 1

- Registration: N900MP (not matched to a registry record)
- Reported make and model: PIPER PA-42-720
- Category: Airplane
- Serial number: 42-5501014
- Engines: P&W PT6A-61 720 horsepower turbo prop
- Damage: No damage
- Flight: Business, Part 91
- Registered owner: Moline Paint Manufactoring Co.
- Airworthiness certificate: Standard, Normal
- Departed: BNA, NASHVILLE, TN
- Destination: PWK, CHICAGO, IL
- Flight plan: IFR
- Airport: ORD, Chicago O'Hare Intl

## Aircraft 2

- Registration: DADSO (not matched to a registry record)
- Reported make and model: MCDONNELL DOUGLAS DC-10
- Category: Airplane
- Engines: GE CF6 51000 lbs thrust turbo fan
- Damage: No damage
- Flight: Part 129
- Registered owner: Condor Flugendienst
- Airworthiness certificate: Standard, Transport
- Departed: ORD, CHICAGO, IL
- Destination: FRNKFRT,GERMANY, OF
- Flight plan: IFR
- Airport: ORD, Chicago O'Hare Intl, runway 32R, 10,003 × 150 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot, aircraft N900MP; age 49; flight instructor, airline transport; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 2, valid medical--no waivers/lim.; seat: left; flight hours: 8,000 total, 5,000 in this make and model
- Pilot, aircraft 2; airline transport; airplane ratings: multi-engine land; instrument ratings: airplane; medical: class 1, valid medical--no waivers/lim.; seat: left; flight hours: 12,000 total, 1,088 in this make and model

## Weather

- Conditions: Visual (VMC), Day
- Wind: 160° at 5 knots
- Visibility: 7 statute miles
- Lowest ceiling: 25,000 ft broken
- Altimeter: 30.00 inHg
- Observed at: ORD, 7 nm away

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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