Pilots and a rno controller reported an airborne conflict when two aircraft took off at the same tim...

Attributes
ACN	1328632
Time
Date	201602
Local Time Of Day	1201-1800
Place
Locale Reference	RNO.Airport
State Reference	NV
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Small Aircraft
Operating Under FAR Part	Part 91
Flight Phase	Takeoff
Flight Plan	None
Aircraft 2
Make Model Name	Small Aircraft High Wing 1 Eng Fixed Gear
Operating Under FAR Part	Part 91
Flight Phase	Takeoff
Flight Plan	None
Person 1
Function	Pilot Flying Single Pilot
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Flight Instructor
Experience	Flight Crew Last 90 Days 60 Flight Crew Total 23000 Flight Crew Type 350
Person 2
Function	Instructor Pilot Flying
Qualification	Flight Crew Instrument Flight Crew Flight Instructor
Experience	Flight Crew Last 90 Days 70 Flight Crew Total 11000 Flight Crew Type 9500
Events
Anomaly	ATC Issue All Types Conflict Airborne Conflict Deviation - Procedural Clearance
Miss Distance	Horizontal 1000 Vertical 200

Narrative:

Our aircraft was holding for takeoff full length runway 34L. Tower cleared other aircraft for takeoff from intersection left and runway 34L; then cleared our aircraft to line up and wait runway 34L. We heard other aircraft acknowledge takeoff clearance.tower then cleared our aircraft to takeoff. As we climbed through approx. 300 feet; passenger in right front seat pointed out other aircraft just lifting off below and well ahead. When tower was questioned; other aircraft requested 'save the tapes.'my conjecture is that other aircraft held at intersection left for some unspecified time before entering runway and beginning takeoff roll; tower; once having cleared it to takeoff; assumed it would depart immediately and didn't verify runway clear before clearing our aircraft for takeoff. As other aircraft was small and white; and intersection left is approximately 5500 feet from our departure position at threshold of rw 34L; it would have been difficult to see against the light concrete runway at this distance. In addition; right seat passenger claims 'he saw other airplane pull out onto runway' after our aircraft had already lifted off; and my attention may have been momentarily diverted to the airspeed indicator.

Original NASA ASRS Text

Title: Pilots and a RNO Controller reported an airborne conflict when two aircraft took off at the same time from RNO 34L; one from a downfield intersection. The aircraft at the intersection mistakenly accepted the takeoff clearance for the full-length aircraft and their read backs blocked each other.

Narrative: Our aircraft was holding for takeoff full length Runway 34L. Tower cleared other aircraft for takeoff from intersection L and Runway 34L; then cleared our aircraft to line up and wait Runway 34L. We heard other aircraft acknowledge takeoff clearance.Tower then cleared our aircraft to takeoff. As we climbed through approx. 300 feet; passenger in right front seat pointed out other aircraft just lifting off below and well ahead. When tower was questioned; other aircraft requested 'save the tapes.'My conjecture is that other aircraft held at intersection L for some unspecified time before entering runway and beginning takeoff roll; tower; once having cleared it to takeoff; assumed it would depart immediately and didn't verify runway clear before clearing our aircraft for takeoff. As other aircraft was small and white; and intersection L is approximately 5500 feet from our departure position at threshold of RW 34L; it would have been difficult to see against the light concrete runway at this distance. In addition; right seat passenger claims 'he saw other airplane pull out onto runway' after our aircraft had already lifted off; and my attention may have been momentarily diverted to the airspeed indicator.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.

Pilots and a rno controller reported an airborne conflict when two aircraft took off at the same time from rno 34L; one from a downfield intersection. The aircraft at the intersection mistakenly accepted the takeoff clearance for the full-length aircraft and their read backs blocked each other.