Near midair collision with arriving medium large transport and departing small aircraft.

Attributes
ACN	275923
Time
Date	199407
Day	Fri
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : jnu
State Reference	AK
Altitude	msl bound lower : 900 msl bound upper : 900
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : jnu artcc : zan
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	cruise other descent : approach
Route In Use	approach : visual
Flight Plan	IFR
Aircraft 2
Make Model Name	Skywagon 185
Operating Under FAR Part	other : unknown
Flight Phase	climbout : takeoff other
Flight Plan	VFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : flight engineer pilot : atp
Experience	flight time last 90 days : 135 flight time total : 11633 flight time type : 986
ASRS Report	275923
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	conflict : nmac non adherence : clearance
Independent Detector	other flight crewa
Resolutory Action	flight crew : took evasive action
Consequence	faa : reviewed incident with flight crew
Miss Distance	horizontal : 0 vertical : 30
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Left base leg at 900 ft MSL 25 degree bank, landing runway 26 jnu. Cessna 185 on floats appeared ahead of leading edge of left wing out of left window, approximately distance 30 ft. Maximum nose up and full power applied with resultant stick shaker and no collision. The aircraft, cessna 185, had been instructed to 'keep us in sight' and 'stay low' by jnu tower. We were given a verbal apology by cessna shortly after the incident and he admitted that he had lost sight of us, contrary to ATC instructions. In talking to the tower, we were subsequently informed that it was a transient aircraft unfamiliar with local terminology and that 900 ft probably meant low to him when he was instructed to 'stay low.' suggestions: hold departing, transient aircraft on the ground until after the arrival of acrs, or issue specific instructions, ie, 'maintain 300 ft or below until 6 DME' vice 'stay low.'

Original NASA ASRS Text

Title: NMAC WITH ARRIVING MLG AND DEPARTING SMA.

Narrative: LEFT BASE LEG AT 900 FT MSL 25 DEG BANK, LNDG RWY 26 JNU. CESSNA 185 ON FLOATS APPEARED AHEAD OF LEADING EDGE OF L WING OUT OF L WINDOW, APPROX DISTANCE 30 FT. MAX NOSE UP AND FULL PWR APPLIED WITH RESULTANT STICK SHAKER AND NO COLLISION. THE ACFT, CESSNA 185, HAD BEEN INSTRUCTED TO 'KEEP US IN SIGHT' AND 'STAY LOW' BY JNU TWR. WE WERE GIVEN A VERBAL APOLOGY BY CESSNA SHORTLY AFTER THE INCIDENT AND HE ADMITTED THAT HE HAD LOST SIGHT OF US, CONTRARY TO ATC INSTRUCTIONS. IN TALKING TO THE TWR, WE WERE SUBSEQUENTLY INFORMED THAT IT WAS A TRANSIENT ACFT UNFAMILIAR WITH LCL TERMINOLOGY AND THAT 900 FT PROBABLY MEANT LOW TO HIM WHEN HE WAS INSTRUCTED TO 'STAY LOW.' SUGGESTIONS: HOLD DEPARTING, TRANSIENT ACFT ON THE GND UNTIL AFTER THE ARR OF ACRS, OR ISSUE SPECIFIC INSTRUCTIONS, IE, 'MAINTAIN 300 FT OR BELOW UNTIL 6 DME' VICE 'STAY LOW.'

Data retrieved from NASA's ASRS site as of July 2007 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.