<< >> NASA ASRS Report 195038, November 1991

TCASII RA caused flight crew of medium large transport to climb. RA was cleared at 12300. Controller advised intruder was a parachute drop at 11600.

Attributes
ACN	195038
Time
Date	199111
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : mmj
State Reference	PA
Altitude	msl bound lower : 12000 msl bound upper : 12300
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : pit
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	cruise other
Route In Use	arrival other
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	climbout : intermediate altitude cruise other descent other
Flight Plan	None
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument pilot : atp
Experience	flight time last 90 days : 210 flight time total : 6411
ASRS Report	195038
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : instrument pilot : commercial
Events
Anomaly	conflict : airborne less severe non adherence : clearance other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 6000 vertical : 700
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Inbound to pit on mmj (montour) 055 degree radial/30 DME at 12000 ft MSL (level), TCASII announced 'climb, climb, climb' and displayed green lights on vsi at approximately +1500 FPM (red lights displayed from +1500 FPM index down to -6000 FPM index). TCASII display showed an RA aircraft symbol (red square) with -04 altitude reference 12 O'clock position and 1-2 mi [captain noted the RA aircraft 'popped up' and was not previously shown on display as a proximity or non-threat aircraft symbol]. Captain executed a climb toward green lights on vsi first officer notified ATC of 'TCASII alert' and execution on progress. At 12300 MSL TCASII announced 'clear of conflict.' first officer notified at we were returning to 12000. ATC (either cleveland center or pit approach, did not note frequency) notified us that traffic was a parachute jump plane VFR at 11600 MSL. Neither the captain nor myself (first officer) visually saw the traffic. Not a good place to drop parachutists.

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Original NASA ASRS Text

Title: TCASII RA CAUSED FLC OF MLG TO CLB. RA WAS CLRED AT 12300. CTLR ADVISED INTRUDER WAS A PARACHUTE DROP AT 11600.

Narrative: INBOUND TO PIT ON MMJ (MONTOUR) 055 DEG RADIAL/30 DME AT 12000 FT MSL (LEVEL), TCASII ANNOUNCED 'CLB, CLB, CLB' AND DISPLAYED GREEN LIGHTS ON VSI AT APPROX +1500 FPM (RED LIGHTS DISPLAYED FROM +1500 FPM INDEX DOWN TO -6000 FPM INDEX). TCASII DISPLAY SHOWED AN RA ACFT SYMBOL (RED SQUARE) WITH -04 ALT REF 12 O'CLOCK POS AND 1-2 MI [CAPT NOTED THE RA ACFT 'POPPED UP' AND WAS NOT PREVIOUSLY SHOWN ON DISPLAY AS A PROX OR NON-THREAT ACFT SYMBOL]. CAPT EXECUTED A CLB TOWARD GREEN LIGHTS ON VSI FO NOTIFIED ATC OF 'TCASII ALERT' AND EXECUTION ON PROGRESS. AT 12300 MSL TCASII ANNOUNCED 'CLR OF CONFLICT.' FO NOTIFIED AT WE WERE RETURNING TO 12000. ATC (EITHER CLEVELAND CENTER OR PIT APCH, DID NOT NOTE FREQ) NOTIFIED US THAT TFC WAS A PARACHUTE JUMP PLANE VFR AT 11600 MSL. NEITHER THE CAPT NOR MYSELF (FO) VISUALLY SAW THE TFC. NOT A GOOD PLACE TO DROP PARACHUTISTS.

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.