Air carrier has close encounter with trees at end of runway. Disturbed some tree branches.

Attributes
ACN	185112
Time
Date	199107
Day	Sun
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : cle
State Reference	OH
Altitude	agl bound lower : 100 agl bound upper : 200
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : cle
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 3 Turbojet Eng
Flight Phase	climbout : takeoff
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : atp pilot : instrument
Experience	flight time total : 10000
ASRS Report	185112
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : instrument pilot : atp pilot : commercial
Experience	flight time total : 18000
ASRS Report	184930
Events
Anomaly	other anomaly other
Independent Detector	other flight crewa
Resolutory Action	other
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	other
Situations
Airport	other physical facility

Narrative:

During initial takeoff roll on runway 28, because of the hump half-way down the runway, the departure end of the runway was not visible. As the takeoff roll progressed, and the departure end of the runway came in to view, an area filled with trees some distance from the end of the runway also came into view. Rotation and liftoff was normal but the vertical separation from the trees seemed less than normal, although there was not the slightest concern by me, or the other crew members, that the takeoff and climb out was anything other than normal. Since none of us had a great deal of familiarity with runway 28 departures, we remarked that the vertical separation from the trees seemed to be less than we were used to at other airports and other runways, although we all felt that the vertical separation was more than adequate. Apparently a report from a security guard at the airport stated that a tree branch or branches were blown by our jet blast. No mention of anything abnormal or unusual was made to us by the tower, and the report came as a total surprise to me. Perhaps the trees are taller than published on our airport t-page and should be measured.

Original NASA ASRS Text

Title: ACR HAS CLOSE ENCOUNTER WITH TREES AT END OF RWY. DISTURBED SOME TREE BRANCHES.

Narrative: DURING INITIAL TKOF ROLL ON RWY 28, BECAUSE OF THE HUMP HALF-WAY DOWN THE RWY, THE DEP END OF THE RWY WAS NOT VISIBLE. AS THE TKOF ROLL PROGRESSED, AND THE DEP END OF THE RWY CAME IN TO VIEW, AN AREA FILLED WITH TREES SOME DISTANCE FROM THE END OF THE RWY ALSO CAME INTO VIEW. ROTATION AND LIFTOFF WAS NORMAL BUT THE VERT SEPARATION FROM THE TREES SEEMED LESS THAN NORMAL, ALTHOUGH THERE WAS NOT THE SLIGHTEST CONCERN BY ME, OR THE OTHER CREW MEMBERS, THAT THE TKOF AND CLBOUT WAS ANYTHING OTHER THAN NORMAL. SINCE NONE OF US HAD A GREAT DEAL OF FAMILIARITY WITH RWY 28 DEPS, WE REMARKED THAT THE VERTICAL SEPARATION FROM THE TREES SEEMED TO BE LESS THAN WE WERE USED TO AT OTHER ARPTS AND OTHER RWYS, ALTHOUGH WE ALL FELT THAT THE VERT SEPARATION WAS MORE THAN ADEQUATE. APPARENTLY A RPT FROM A SECURITY GUARD AT THE ARPT STATED THAT A TREE BRANCH OR BRANCHES WERE BLOWN BY OUR JET BLAST. NO MENTION OF ANYTHING ABNORMAL OR UNUSUAL WAS MADE TO US BY THE TWR, AND THE RPT CAME AS A TOTAL SURPRISE TO ME. PERHAPS THE TREES ARE TALLER THAN PUBLISHED ON OUR ARPT T-PAGE AND SHOULD BE MEASURED.

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.