- Date
- September 19, 1986, 11:30 local (18:30 UTC)
- Place
- St. Johns, AZ
- Injuries
- 1 uninjured
- Damage
- Substantial damage
- Phase of flight
- Initial climb
- Aircraft
- N99QBForbes-Wolfram Special DSA-1M
- Weather
- Visual (VMC) · Day
- Status
- Completed
- Report
- Approved by Office Director
- FAA report
- 19860919048919A
- Case key
- 24953
From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.
On this page
Sequence of events
NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.
Analysis
The plt reported that persons over 5 ft 9 in tall experience limited right aileron control authority due to the small cockpit of the homebuilt experimental acft, which is used exclusively for air racing. The plt said the right knee of tall persons limits the control stick movement to 'about 2/5THS of the available travel.' The acft has no elec system & must be flown x-country with another acft for com & nav capability. The acft was being escorted by a harvard mk vii acft. The plt said he departed immediately behind the harvard & encountered 'the wing vortex' from it, which rolled the aircraft to the left at an alt of 6 ft AGL. The pilot said that with the limited right aileron authority, he could not arrest the roll rate prior to reaching the inverted position. The pilot said he then landed the aircraft 'straight ahead as gently as possible.'
Aircraft
- Registration
- N99QB
- Reported as
- Forbes-Wolfram Special DSA-1M
- Category
- Airplane, amateur-built
- Serial number
- F-1
- Airframe hours
- 390
- Engine
- Lycoming O-320-A2B, 150 horsepower, reciprocating
- Damage
- Substantial damage
- Flight
- Ferry · Part 91
- Registered owner
- Alan Preston Racing
- Airworthiness certificate
- Special, Experimental (Special)
- Last inspection
- Annual · May 1, 1986
- Departed
- SJN · St. John, AZ
- Destination
- DAL · Dallas, TX
- Airport
- SJN · St. Johns Industr., runway 20, 3,400 × 60 ft, asphalt
Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.
Flight crew
As NTSB recorded them. NTSB leaves out names.
- Role
- Pilot
- Age
- 34
- Certificate
- Commercial
- Airplane ratings
- Single-engine land
- Medical
- Class 2, Valid Medical--no waivers/lim.
- Seat
- Center
- Flight hours
- 1,334 total · 320 in this make and model · 1,323 as pilot in command · 82 in the last 90 days · 4 in the last 24 hours
Weather
- Conditions
- Visual (VMC) · Day
- Wind
- 210° at 15 knots, gusting 20
- Visibility
- 60 statute miles
- Lowest ceiling
- 4,000 ft overcast
- Temperature
- 75 °F
- Altimeter
- 30.00 inHg
FAA reports on this event · 1
The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.