Diamond DA-20-C1 N921DA
6 March 2007 · Pueblo, Colorado, United States · No injuries
Summary
On 6 March 2007 at about 16:00 local time, a Diamond DA-20-C1 registered N921DA was involved in an incident near Pueblo, Colorado, United States. 2 people were on board and nobody was injured. The NTSB has published a probable cause for this accident; it is quoted in full below.
The record
- Date
- at 16:00
- Classification
- Incident
- Location
- Pueblo, Colorado, United States
- Nearest airport
- Pueblo Memorial (PUB)
- Coordinates
- 38.2890, -104.5395
- Aircraft
- Diamond DA-20-C1
- Registration
- N921DA
- Category
- Airplane
- Engines
- 1
- Operator
- Not recorded
- Operating rule
- Part 91: General Aviation
- Purpose of flight
- Instructional
- Phase of flight
- Not recorded
- Route
- Pueblo → Pueblo
- Aircraft damage
- Not recorded
- Weather
- VMC
- Light
- Day
- NTSB number
- DEN07IA066
People
Nobody was injured.
| On board | Died | Serious | Minor | Uninjured |
|---|---|---|---|---|
| 2 | 0 | 0 | 0 | 2 |
Probable cause
The failure of the horizontal stabilizer forward bracket bolts due to insufficent preload during factory installation.
Quoted verbatim from the NTSB record. This site does not paraphrase or interpret it.
Read the full NTSB narrative
The flight instructor reported that abnormal nose-up trim was required while in flight. The flight concluded without additional or further incidence. After the training flight a 2 to 3-inch gap between the horizontal and vertical stabilizer was noted. Examination of the airplane revealed two bolts, securing the front horizontal stabilizer mounting bracket to the vertical stabilizer, had failed. Examination of the bolts revealed failure due to undetected fatigue. On the failed bolts, the sizes of the final overstress regions were very small indicating that peak and mean loads on the bolts were also small. This would indicate that only a small or marginal preload was present on the bolts. Insufficient preload could be the result of low installation torque or the loss of preload during service. The off center wear on the washers suggests that the fastened surfaces may not have been in alignment allowing the installation preload to quickly degrade.
Quoted verbatim from the NTSB record.
Other Diamond DA-20 accidents
| Date | Aircraft | Location | Operator | Outcome | Died |
|---|---|---|---|---|---|
| 24 Nov 2007 | Diamond DA-20-C1 | Mesa, Arizona, United States | - | No injuries | - |
| 11 Oct 2007 | Diamond DA 20-C1 | Santaquin, Utah, United States | Diamond Flight Center | No injuries | - |
| 21 Apr 2007 | Diamond DA 20-A1 | Warrenton, Missouri, United States | - | No injuries | - |
| 20 Dec 2008 | Diamond DA 20-C1 | Alamo Lake State Park, Arizona, United States | Sabena Airline Training Center, Inc. | Fatal | 1 |
| 21 Mar 2008 | Diamond DA 20-C1 | Pueblo, Colorado, United States | Doss Aviation IFS | No injuries | - |
| 1 Aug 2008 | Diamond DA-20-C1 | Peachtree City, Georgia, United States | Falcon Aviation Academy | Minor injuries | - |
Other accidents in this area
| Date | Aircraft | Location | Operator | Outcome | Died |
|---|---|---|---|---|---|
| 11 Apr 2007 | Cessna 170A | Watkins, Colorado, United States | - | No injuries | - |
| 2 Nov 2007 | Cessna TP206A | Boulder, Colorado, United States | - | Minor injuries | - |
| 5 Nov 2007 | Piper PA-18-150 | Cortez, Colorado, United States | - | No injuries | - |
| 18 Aug 2007 | Air Tractor AT-301 | Alamosa, Colorado, United States | - | Minor injuries | - |
| 19 Aug 2007 | Cessna A185F | Lake City, Colorado, United States | - | No injuries | - |
| 21 Aug 2007 | Eaa Biplane P | Parker, Colorado, United States | Terrance R. Vinton | Minor injuries | - |