Individually Owned: 150,657
Corporate Owned: 137,281
Aircraft Accident/Incident Report
Compton, California 90220
Tuesady, October 23, 1990 19:46 PDT
NTSB Narrative Summary Released at Completion of Accident
TWO HELICOPTERS WERE BEING USED IN LAW ENFORCEMENT ACTIVITIES. ONE WAS A LOS ANGELES SHERIFF'S DEPT (LASD) MCDONNELL- DOUGLAS 369E, N451DS, CALL SIGN AIR 21. THE OTR WAS A COMPTON POLICE DEPT (CPD) ENSTROM F-28F, N48HR, CALL SIGN AIR 28. WHILE IN THE LAX TCA, AIR 21 RESPONDED TO AN EMERG CALL. AFTER DEPG THE TCA, THE PLT (AIR 21) SWITCHED HIS COM RADIO TO 123.02 MHZ (COMMON FREQ FOR LAW ENFORCEMENT IN THE AREA) & ANNOUNCED HIS PSN. WHEN NO RESPONSE WAS RCVD, HE SWITCHED TO THE COMPTON UNICOM FREQ (122.9 MHZ). AT ABOUT THAT TIME, AIR 28 WAS ORBITING IN THE SAME VCNTY. THE PLT OF AIR 28 SAID HE HAD ANNOUNCED HIS PSN ON 122.9 MHZ (RQRD FREQ IN THE AREA FOR CPD ACFT) & WAS MONITORING 123.02 MHZ. THE 2 CONVERGED & COLLIDED, BUT BOTH REMAINED CONTROLLABLE & WERE LNDD FROM EMERG APCHS. BFR THE MIDAIR, THE PLT OF AIR 21 WAS HELPING HIS OBSERVER LOOK FOR A PSN ON A MAP. HE SAW AIR 28 JUST BFR IMPACT, BUT NOT IN TIME TO AVOID A COLLISION. THE PLT OF AIR 28 HAD HIS TRANSPONDER ON STANDBY, ALTHO HE WAS REQD TO BE OPERG IT, WHILE WITHIN 30 MI OF THE (GROUP 1) TCA.
NTSB Probable Cause Narrative
INADEQUATE VISUAL LOOKOUT BY THE PILOTS OF BOTH AIRCRAFT, WHICH RESULTED IN A FAILURE OF EACH TO SEE-AND-AVOID CONFLICTING TRAFFIC. FACTORS RELATED TO THE ACCIDENT WERE: DARKNESS, FAILURE OF THE PILOT OF AIR 28 (N48HR) TO USE HIS TRANSPONDER NEAR THE TCA, AND THE PILOT OF AIR 21 DIVERTED TOO MUCH OF HIS ATTENTION TO A MAP.
Event Information
| Type of Event | Accident |
| Event Date | 10/23/1990 |
| Event Day of the Week | Tuesday |
| Time of Event | 1946 |
| Event Time Zone | Pacific Daylight Time |
| Event City | COMPTON |
| Event State | CALIFORNIA |
| Event Country | -- |
| Zipcode of the event site | 90220 |
| Event Date Year | 1990 |
| Event Date Month | 10 |
| MidAir Collision Indicator | Yes |
| On Ground Collision occurred ? | No |
| 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 | Unknown |
| 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 | Night/Bright |
| 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) | 10 |
| Air Temperature at event time (in degrees celsius) | 21 |
| Dew Point at event time (in degress fahrenheit) | -- |
| Wind Direction (degrees magnetic) | 250 |
| Variable Wind Indicator | Unknown |
| Wind Speed (knots) | 9 |
| Wind Velocity Indicator | Unknown |
| Wind Gust Indicator | Not Gusting |
| Wind Gust (knots) | 0 |
| Altimeter Setting at event time (in. Hg) | 29 |
| 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 | 4 |
| Injury Total Serious | -- |
| Injury Total All | -- |
| Investigating Agency | NTSB |
| NTSB Docket Number (internal use) | 2319 |
| NTSB Notification Source | -- |
| NTSB Notification Date | Oct 23 1990 12:00AM |
| NTSB Notification Time | 2106 |
| Fiche Number and/or location -used to find docket information | 45945 |
| Date of most recent change to record | Dec 12 2000 5:28PM |
| 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 | N451DS | N48HR |
| NTSB Number | LAX91GA016A | LAX91GA016B |
| Missing Aircraft Indicator | N | N |
| Federal Aviation Reg. Part | Part 91: General Aviation | Part 91: General Aviation |
| Type of Flight Plan filed | None | None |
| Flight plan Was Activated? | -- | -- |
| Damage | Substantial | Substantial |
| Aircraft Fire | None | None |
| Aircraft Explosion | None | None |
| Aircraft Manufacturer's Full Name | McDonnell Douglas | ENSTROM |
| Aircraft Model | 369E | F-28F |
| Aircraft Series Identifier | 369E | F-28F |
| Aircraft Serial Number | 0251E | 755 |
| Certified Max Gross Weight | 3000 | 2350 |
| Aircraft Category | Helicopter | Helicopter |
| Aircraft Registration Class | U.S. Registered/U.S. Soil | U.S. Registered/U.S. Soil |
| Aircraft is a homebuilt? | No | No |
| Flight Crew Seats | -- | -- |
| Cabin Crew Seats | -- | -- |
| Passenger Seats | -- | -- |
| Total number of seats on the aircraft | 4 | 2 |
| Number of Engines | 1 | 1 |
| Fixed gear or retractable gear | Fixed | Fixed |
| Aircraft, Type of Last Inspection | 100 Hour | 100 Hour |
| Date of Last Inspection | Sep 28 1990 12:00AM | Oct 17 1990 12:00AM |
| Airframe hours since last inspection | 75 | -- |
| Airframe Hours | 3168 | 1986 |
| ELT Installed | No | No |
| ELT Activated | Unknown | Unknown |
| ELT Aided Location of Event Site | Unknown | Unknown |
| ELT Type | -- | -- |
| Aircraft Owner Name | ||
| Aircraft Owner Street Address | ||
| Aircraft Owner City | ||
| Aircraft Owner State | ||
| Aircraft Owner Country | ||
| Aircraft Owner Zipcode | ||
| Operator is an individual? | -- | -- |
| Operator Name | LOS ANGELES SHERIFF DEPT. | COMPTON POLICE DEPARTMENT |
| Operator Same as Owner? | No | No |
| Operator Is Doing Business As | -- | -- |
| Operator Address Same as Owner? | No | No |
| Operator Street Address | 211 W. TEMPLE ST. | 901 W. ALONDRA |
| Operator City | LOS ANGELES | COMPTON |
| Operator State | CA | CA |
| Operator Country | ||
| Operator Zip code | 90012 | 90220 |
| Operator Code | ||
| Owner has at least one certificate | None | 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 | -- | -- |
| Indicates Domestic or International Flight | -- | -- |
| Operator carrying Pax/Cargo/Mail | -- | -- |
| Type of Flying (Per_Bus / Primary) | Public Use | Public Use |
| Second Pilot on Board | No | Unknown |
| Departure Point Same as Event | No | No |
| Departure Airport Code | NONE | CPM |
| Departure City | CARSON | COMPTON |
| Departure State | CA | CA |
| Departure Country | ||
| Departure Time | 1930 | 1810 |
| Departure Time Zone | PDT | PDT |
| Destination Same as Local Flt | dest & departure same, accident can occur anywhere | dest & departure same, accident can occur anywhere |
| Destination Airport Code | ||
| Destination City | ||
| Destination State | ||
| Destination Country | ||
| Specific Phase of Flight | Cruise | Maneuvering |
| Report sent to ICAO? | -- | -- |
| Evacuation occurred | -- | -- |
| Date of most recent change to record | Jan 2 2001 10:35AM | Dec 12 2000 5:28PM |
| 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 | -- | -- |