2 altdevs altitude excursion altitude overshot in descent after TCASII RA.

Attributes
ACN	276650
Time
Date	199407
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : stl
State Reference	MO
Altitude	msl bound lower : 6700 msl bound upper : 7700
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : stl tracon : oak
Operator	common carrier : air carrier
Make Model Name	Fokker 100
Operating Under FAR Part	Part 121
Flight Phase	cruise other
Route In Use	arrival other arrival star : star
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	climbout : intermediate altitude cruise other
Route In Use	departure other departure sid : sid
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	276650
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Events
Anomaly	altitude deviation : overshoot altitude deviation : excursion from assigned altitude non adherence : clearance other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other controllera other flight crewa
Resolutory Action	flight crew : became reoriented flight crew : took evasive action flight crew : returned to intended course or assigned course
Consequence	Other
Miss Distance	vertical : 1700
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	Pilot Deviation

Narrative:

Level 11000 ft on trake arrival to stl. Cleared to 7000 ft. Slowed 250 KTS and extended speed brakes. Passing 7300 ft TCASII RA sounded with climb command. Approach had not previously issued traffic. Climb commenced, traffic acquired visually and conflict resolved by 7700 ft. Aircraft was cleared to 6000 ft (other aircraft Y) on the departure. ATC was notified of the deviation and we were cleared back to 7000 ft. Aircraft did not level at 7000 ft and descended below 7000 ft before recovery was initiated. Aircraft X descended to about 6700 ft before reversal was accomplished. Aircraft flown to 7000 ft promptly. ATC asked for altitude confirmation. We confirmed 7000 ft and were cleared to 4000 ft and the rest of the arrival was uneventful.

Original NASA ASRS Text

Title: 2 ALTDEVS ALT EXCURSION ALT OVERSHOT IN DSCNT AFTER TCASII RA.

Narrative: LEVEL 11000 FT ON TRAKE ARR TO STL. CLRED TO 7000 FT. SLOWED 250 KTS AND EXTENDED SPD BRAKES. PASSING 7300 FT TCASII RA SOUNDED WITH CLB COMMAND. APCH HAD NOT PREVIOUSLY ISSUED TFC. CLB COMMENCED, TFC ACQUIRED VISUALLY AND CONFLICT RESOLVED BY 7700 FT. ACFT WAS CLRED TO 6000 FT (OTHER ACFT Y) ON THE DEP. ATC WAS NOTIFIED OF THE DEV AND WE WERE CLRED BACK TO 7000 FT. ACFT DID NOT LEVEL AT 7000 FT AND DSNDED BELOW 7000 FT BEFORE RECOVERY WAS INITIATED. ACFT X DSNDED TO ABOUT 6700 FT BEFORE REVERSAL WAS ACCOMPLISHED. ACFT FLOWN TO 7000 FT PROMPTLY. ATC ASKED FOR ALT CONFIRMATION. WE CONFIRMED 7000 FT AND WERE CLRED TO 4000 FT AND THE REST OF THE ARR WAS UNEVENTFUL.

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.