Individually Owned: 150,657
Corporate Owned: 137,281
Aircraft Accident/Incident Report
Casper, Wyoming 82602
Tuesady, June 2, 1987 10:12 MDT
NTSB Narrative Summary Released at Completion of Accident
BOEING 727 (NORTHWEST FLT 354) & USAF EC-135 (SLUM 51) WERE INVOLVED IN A NR COLLISION AT FL 330. THE MISHAP OCCURRED ASFLT 354 WAS ENE BND ON J-158 & SLUM 51 WAS FLYING ON A RADIAL-DISTANCE (R/D) FLT PLN, FLYING BTN R/D PTS SOUTH OF J-158.AS SLUM 51 APCHD ITS MOST WESTERN PT, THE CREW REQD A RGT TURN TO A R/D PT THAT WAS NOT THE NEXT LISTED PT ON THEIR FLT PLN. THE TRAINEE CTLR (T/C) DIDN'T REALIZE SLUM 51 WAS REQG A ROUTE CHG, BUT THOUGHT THE FLT WANTED TO TURN BACK EAST TOTHE NEXT FILED R/D PT WITH A RGT TURN (INSTEAD OF A L TURN AS PREVIOUSLY DONE). THE T/C REPLIED, 'UNABLE RGT TURN, MAKE A LEFT TURN.' THE INSTRUCTOR HEARD THE REQ, BUT THOUGHT THE T/C'S REPLY WAS DISAPPROVAL OF A ROUTE CHG. AS THE CTLRS TURNED THEIR ATTN TO OTR (HVY/COMPLEX) TRAFFIC, SLUM 51 CONTD A 270 DEG L TURN (TO NORTH) & CONVERGED WITH FLT 354. THE 9020 (PRIMARY) COMPUTER WAS INOP; THE DARC (BACKUP) COMPUTER HAD NO CAPABILITY OF DISPLAYING PROJECTED ROUTES OR PROVID-ING CONFLICT ALERT. NO FLOW CTL RESTRICTIONS WERE IN EFFECT TO RDC THE AMOUNT OF TRAFFIC.
NTSB Probable Cause Narrative
Not Yet Reported
Event Information
| Type of Event | Incident |
| Event Date | 6/2/1987 |
| Event Day of the Week | Tuesday |
| Time of Event | 1012 |
| Event Time Zone | Mountain Daylight Time |
| Event City | CASPER |
| Event State | WYOMING |
| Event Country | -- |
| Zipcode of the event site | 82602 |
| Event Date Year | 1987 |
| Event Date Month | 6 |
| MidAir Collision Indicator | -- |
| On Ground Collision occurred ? | -- |
| Event Location Latitude | |
| Event Location Longitude | |
| Event Location Airport | |
| Event Location Nearest Airport ID | |
| Indicates whether the acc/inc occurred off or on an airport | Off Airport/Airstrip |
| Distance from airport in statute miles | 0 |
| Degrees magnetic from airport | 0 |
| Airport Elevation | 0 |
| Weather Briefing Completeness | Not pertinent |
| Investigator's weather source | Pilot |
| Time of the weather observation | 0 |
| Direction of event from weather observation facility (degrees) | 0 |
| Weather Observation Facility ID | |
| Elevation of weather observation facility | 0 |
| Distance of event from weather observation facility (units?) | 0 |
| Time Zone of the weather observation | |
| Lighting Conditions | Day |
| Lowest Ceiling Height | 0 |
| Lowest Non-Ceiling Height | 0 |
| Sky/Lowest/Cloud Conditions | Clear |
| Sky Condition for Lowest Ceiling | None |
| Visibility Runway Visual Range (Feet) | 0 |
| Visibility Runway Visual Value (Statute Miles) | 0 |
| Visibility (Statute Miles) | 0 |
| Air Temperature at event time (in degrees celsius) | -- |
| Dew Point at event time (in degress fahrenheit) | -- |
| Wind Direction (degrees magnetic) | 0 |
| Variable Wind Indicator | Unknown |
| Wind Speed (knots) | 0 |
| Wind Velocity Indicator | Unknown |
| Wind Gust Indicator | Unknown |
| Wind Gust (knots) | 0 |
| Altimeter Setting at event time (in. Hg) | -- |
| Density Altitude (feet) | -- |
| Intensity of Precipitation | Unknown |
| METAR weather report | -- |
| Event Highest Injury | None |
| On Ground, Fatal Injuries | 0 |
| On Ground, Minor Injuries | 0 |
| On Ground, Serious Injuries | 0 |
| Injury Total Fatal | -- |
| Injury Total Minor | -- |
| Injury Total None | 72 |
| Injury Total Serious | -- |
| Injury Total All | -- |
| Investigating Agency | NTSB |
| NTSB Docket Number (internal use) | 5036 |
| NTSB Notification Source | -- |
| NTSB Notification Date | Jun 2 1987 12:00AM |
| NTSB Notification Time | 1730 |
| Fiche Number and/or location -used to find docket information | |
| Date of most recent change to record | Apr 9 2001 10:27AM |
| User who most recently changed record | dbo |
| Basic weather conditions | Visual Meteorological Cond |
| FAA District Office | -- |
Aircraft Involved |
||
|---|---|---|
Aircraft #1 |
Aircraft #2 |
|
| Aircraft Registration Number | N297US | USAF |
| NTSB Number | DEN87IA145A | DEN87IA145B |
| Missing Aircraft Indicator | N | N |
| Federal Aviation Reg. Part | Part 121: Air Carrier | Armed Forces |
| Type of Flight Plan filed | IFR | IFR |
| Flight plan Was Activated? | -- | -- |
| Damage | None | None |
| Aircraft Fire | None | None |
| Aircraft Explosion | None | None |
| Aircraft Manufacturer's Full Name | BOEING | Boeing |
| Aircraft Model | 727-251 | EC-135 |
| Aircraft Series Identifier | 727-251 | EC-135 |
| Aircraft Serial Number | 21789 | |
| Certified Max Gross Weight | 191500 | 325000 |
| Aircraft Category | Airplane | Airplane |
| Aircraft Registration Class | U.S. Registered/U.S. Soil | Military |
| Aircraft is a homebuilt? | No | No |
| Flight Crew Seats | -- | -- |
| Cabin Crew Seats | -- | -- |
| Passenger Seats | -- | -- |
| Total number of seats on the aircraft | 134 | -- |
| Number of Engines | 3 | 4 |
| Fixed gear or retractable gear | Retractable | Retractable |
| Aircraft, Type of Last Inspection | Unknown | Unknown |
| Date of Last Inspection | -- | -- |
| Airframe hours since last inspection | -- | -- |
| Airframe Hours | -- | -- |
| ELT Installed | No | No |
| ELT Activated | Unknown | Unknown |
| ELT Aided Location of Event Site | Unknown | Unknown |
| ELT Type | -- | -- |
| Aircraft Owner Name | NORTHWEST AIRLINES, INC. | UNITED STATES AIR FORCE |
| Aircraft Owner Street Address | MINNEAPOLIS-ST. PAUL IT'L ARPT | |
| Aircraft Owner City | ST. PAUL | ELLSWORTH AFB |
| Aircraft Owner State | MN | SD |
| Aircraft Owner Country | ||
| Aircraft Owner Zipcode | 55111 | |
| Operator is an individual? | -- | -- |
| Operator Name | ||
| Operator Same as Owner? | Yes | Yes |
| Operator Is Doing Business As | -- | -- |
| Operator Address Same as Owner? | Yes | Yes |
| Operator Street Address | ||
| Operator City | ||
| Operator State | ||
| Operator Country | ||
| Operator Zip code | ||
| Operator Code | NWAA | |
| Owner has at least one certificate | Yes - certificate holder | None |
| Other Operator of large aircraft? | No | No |
| Certified for Part 133 or 137 Operation | Unknown | Unknown |
| Operator Certificate Number | -- | -- |
| Indicates whether an air carrier operation was scheduled or not | Scheduled | Unknown |
| Indicates Domestic or International Flight | Domestic | Unknown |
| Operator carrying Pax/Cargo/Mail | Passenger Only | Unknown |
| Type of Flying (Per_Bus / Primary) | Unknown | Unknown |
| Second Pilot on Board | Yes | Yes |
| Departure Point Same as Event | Yes | No |
| Departure Airport Code | SFO | RCA |
| Departure City | SAN FRANCISCO | RAPID CITY |
| Departure State | CA | SD |
| Departure Country | ||
| Departure Time | 0 | 705 |
| Departure Time Zone | MDT | |
| Destination Same as Local Flt | -- | dest & departure same, accident can occur anywhere |
| Destination Airport Code | MSP | |
| Destination City | MINNEAPOLIS | |
| Destination State | MN | |
| Destination Country | ||
| Specific Phase of Flight | Cruise | Cruise |
| Report sent to ICAO? | -- | -- |
| Evacuation occurred | -- | -- |
| Date of most recent change to record | Jan 2 2001 10:30AM | Oct 22 2001 3:26PM |
| User who most recently changed record | dbo | dbo |
| Since inspection or accident | -- | -- |
| Event Location Runway Number and Location | 0 | 0 |
| Runway Length | 0 | 0 |
| Runway Width | 0 | 0 |
| Sight Seeing flight | No | No |
| Air Medical Flight | No | No |
| Medical Flight | -- | -- |