Individually Owned: 150,657
Corporate Owned: 137,281
Phoenix Sky Harbor Int. Airport
Aircraft Accident/Incident Report
Phoenix, Arizona 85027
Saturday, March 12, 1994 23:20 MST
NTSB Narrative Summary Released at Completion of Accident
The pilot moved the landing gear selector switch to the down position; however, the landing gear did not extend. The pilot used the emergency gear down system; however, both main landing gear extended only partially and the main wheels failed to rotate to the streamlined position. The main gear collapsed on landing, resulting in damage to the lower fuselage bulkheads and gear attach structure. No hydraulic fluid was found in the system lines, and no leaks detected around the landing gear wells. The nitrogen system pressure was measured at 50 psi; the normal system pressure is 425 to 525 psi. Review of the hydraulic system lines revealed a metal line ruptured with hydraulic fluid saturating the immediate area. The maintenance records indicated the ruptured line was an original equipment item and at least 24 years old. A leak was found in the nitrogen system lines in the wing center section crossover line. Corrosion pitting was observed in several places on both of the lines.
NTSB Probable Cause Narrative
the failure of the hydraulic and nitrogen system pressure lines, due to an inadequate maintenance inspection program, which failed to detect the corrosion condition of the lines.
Event Information
| Type of Event | Accident |
| Event Date | 3/12/1994 |
| Event Day of the Week | Saturday |
| Time of Event | 2320 |
| Event Time Zone | Mountain Standard Time |
| Event City | PHOENIX |
| Event State | ARIZONA |
| Event Country | -- |
| Zipcode of the event site | 85027 |
| Event Date Year | 1994 |
| Event Date Month | 3 |
| MidAir Collision Indicator | No |
| On Ground Collision occurred ? | No |
| Event Location Latitude | |
| Event Location Longitude | |
| Event Location Airport | PHOENIX SKY HARBOR INT. |
| Event Location Nearest Airport ID | PHX |
| Indicates whether the acc/inc occurred off or on an airport | On Airport |
| Distance from airport in statute miles | -- |
| Degrees magnetic from airport | -- |
| Airport Elevation | 1133 |
| 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/Dark |
| Lowest Ceiling Height | 0 |
| Lowest Non-Ceiling Height | 6000 |
| Sky/Lowest/Cloud Conditions | Scattered |
| Sky Condition for Lowest Ceiling | None |
| Visibility Runway Visual Range (Feet) | 0 |
| Visibility Runway Visual Value (Statute Miles) | 0 |
| Visibility (Statute Miles) | 70 |
| Air Temperature at event time (in degrees celsius) | -- |
| Dew Point at event time (in degress fahrenheit) | -- |
| Wind Direction (degrees magnetic) | 0 |
| Variable Wind Indicator | Variable |
| Wind Speed (knots) | 0 |
| Wind Velocity Indicator | Light and Variable |
| Wind Gust Indicator | Not Gusting |
| 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 | 5 |
| Injury Total Serious | -- |
| Injury Total All | -- |
| Investigating Agency | NTSB |
| NTSB Docket Number (internal use) | 236 |
| NTSB Notification Source | -- |
| NTSB Notification Date | Mar 14 1993 12:00AM |
| NTSB Notification Time | 1430 |
| Fiche Number and/or location -used to find docket information | IMAGE |
| Date of most recent change to record | Dec 6 2000 10:50AM |
| User who most recently changed record | dbo |
| Basic weather conditions | Visual Meteorological Cond |
| FAA District Office | -- |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | N78CH |
| NTSB Number | LAX94LA163 |
| Missing Aircraft Indicator | N |
| Federal Aviation Reg. Part | Part 135: Air Taxi & Commuter |
| Type of Flight Plan filed | IFR |
| Flight plan Was Activated? | -- |
| Damage | Substantial |
| Aircraft Fire | None |
| Aircraft Explosion | None |
| Aircraft Manufacturer's Full Name | ROCKWELL |
| Aircraft Model | 681 |
| Aircraft Series Identifier | 681 |
| Aircraft Serial Number | 6038 |
| Certified Max Gross Weight | 9450 |
| Aircraft Category | Airplane |
| Aircraft Registration Class | U.S. Registered/U.S. Soil |
| Aircraft is a homebuilt? | No |
| Flight Crew Seats | -- |
| Cabin Crew Seats | -- |
| Passenger Seats | -- |
| Total number of seats on the aircraft | 6 |
| Number of Engines | 2 |
| Fixed gear or retractable gear | Retractable |
| Aircraft, Type of Last Inspection | 100 Hour |
| Date of Last Inspection | Oct 26 1993 12:00AM |
| Airframe hours since last inspection | 96 |
| Airframe Hours | 4424 |
| ELT Installed | Yes |
| ELT Activated | No |
| ELT Aided Location of Event Site | Unknown |
| ELT Type | -- |
| Aircraft Owner Name | C&R FLYING SERVICE, INC. |
| Aircraft Owner Street Address | P.O. BOX 179 |
| Aircraft Owner City | BAYTOWN |
| Aircraft Owner State | TX |
| Aircraft Owner Country | |
| Aircraft Owner Zipcode | 77552 |
| Operator is an individual? | -- |
| Operator Name | AMERICAN CORP AVIATION |
| Operator Same as Owner? | No |
| Operator Is Doing Business As | -- |
| Operator Address Same as Owner? | No |
| Operator Street Address | 14630 BRAMBLEWOOD DRIVE |
| Operator City | HOUSTON |
| Operator State | TX |
| Operator Country | |
| Operator Zip code | 77079 |
| Operator Code | ANDA |
| Owner has at least one certificate | Yes - certificate holder |
| Other Operator of large aircraft? | No |
| Certified for Part 133 or 137 Operation | Unknown |
| Operator Certificate Number | -- |
| Indicates whether an air carrier operation was scheduled or not | Non-scheduled |
| Indicates Domestic or International Flight | Domestic |
| Operator carrying Pax/Cargo/Mail | Passenger Only |
| Type of Flying (Per_Bus / Primary) | Unknown |
| Second Pilot on Board | No |
| Departure Point Same as Event | No |
| Departure Airport Code | SOW |
| Departure City | SHOW LOW |
| Departure State | AZ |
| Departure Country | |
| Departure Time | 2230 |
| Departure Time Zone | MST |
| Destination Same as Local Flt | crash at destination city |
| Destination Airport Code | |
| Destination City | |
| Destination State | |
| Destination Country | |
| Specific Phase of Flight | Approach |
| Report sent to ICAO? | -- |
| Evacuation occurred | -- |
| Date of most recent change to record | Jan 2 2001 10:34AM |
| User who most recently changed record | dbo |
| Since inspection or accident | -- |
| Event Location Runway Number and Location | 26R |
| Runway Length | 11001 |
| Runway Width | 150 |
| Sight Seeing flight | No |
| Air Medical Flight | No |
| Medical Flight | -- |