Close proximity air carrier-heavy transport GA-small aircraft over iah.

Attributes
ACN	193237
Time
Date	199111
Day	Sat
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : iah
State Reference	TX
Altitude	msl bound lower : 5300 msl bound upper : 5500
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	tracon : iah
Operator	general aviation : personal
Make Model Name	Small Aircraft, Low Wing, 1 Eng, Fixed Gear
Flight Phase	cruise other
Flight Plan	VFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Heavy Transport, Low Wing, 4 Turbojet Eng
Flight Phase	cruise other
Flight Plan	IFR
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : instrument
Experience	flight time last 90 days : 200 flight time total : 1200
ASRS Report	193237
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	altitude deviation : overshoot conflict : nmac non adherence : clearance
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	flight crew : returned to intended course or assigned course
Consequence	Other
Miss Distance	horizontal : 500 vertical : 200
Supplementary
Primary Problem	Flight Crew Human Performance

Narrative:

Departed huntsville, set altimeter to field elevation, entering hou TCA directed to maintain 5500. Traffic pointed out at 12 O'clock, 5000, a heavy transport, opposite bound. Heavy transport was at 5100 and I had descended to 5300 because failed to change to houston altimeter setting. Mode C readout 5300, the altimeter in the plane read 5500. The heavy transport said his TCASII said 200 ft difference between us. What should have been done by me is change barometric setting, and doublechked altimeter, especially when traffic is pointed out.

Original NASA ASRS Text

Title: CLOSE PROX ACR-HVT GA-SMA OVER IAH.

Narrative: DEPARTED HUNTSVILLE, SET ALTIMETER TO FIELD ELEVATION, ENTERING HOU TCA DIRECTED TO MAINTAIN 5500. TFC POINTED OUT AT 12 O'CLOCK, 5000, A HVT, OPPOSITE BOUND. HVT WAS AT 5100 AND I HAD DSNDED TO 5300 BECAUSE FAILED TO CHANGE TO HOUSTON ALTIMETER SETTING. MODE C READOUT 5300, THE ALTIMETER IN THE PLANE READ 5500. THE HVT SAID HIS TCASII SAID 200 FT DIFFERENCE BTWN US. WHAT SHOULD HAVE BEEN DONE BY ME IS CHANGE BAROMETRIC SETTING, AND DOUBLECHKED ALTIMETER, ESPECIALLY WHEN TFC IS POINTED OUT.

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.