Flight crew of S80 has localizer deflection during approach into tul. They tried checking to determi...

Attributes
ACN	419593
Time
Date	199811
Day	Sun
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : tul airport : tul
State Reference	OK
Altitude	agl bound lower : 700 agl bound upper : 2000
Aircraft 1
Controlling Facilities	tower : tul
Operator	common carrier : air carrier
Make Model Name	MD-80 Super 80
Operating Under FAR Part	Part 121
Navigation In Use	Other
Flight Phase	descent : approach
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	419593
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	none taken : unable
Consequence	faa : reviewed incident with flight crew
Supplementary
Primary Problem	Navigational Facility
Air Traffic Incident	other
Situations
Airport	other physical facility
Navigational Aid	Unspecified

Narrative:

Tul tower. Location: on localizer approach to runway 18L tul. From 2000 ft AGL to 700 ft AGL runway 18L localizer, localizer deflection noticed on autoflt system and on navigation instruments. After autoplt was disconnected, localizer was still erratic. This problem was confirmed by another airline flight following on same approach. Runway 18L has been under construction, which may have affected localizer signal integrity. Suggest further follow up and analysis by appropriate auths. Callback conversation with reporter revealed the following information: reporter states that he made another trip into tul and had hoped to check the localizer deviations to see if the conditions had changed. It was difficult because there was so much wind. They did make a coupled approach on runway 18L ILS and there were still deviations. He could see the work going on with the approach lights and reporter wonders if that may be causing some of the problems. He has learned that the efforts are to bring runway 18L up to a CAT ii status. The company does know about the situation but reporter does not know if any action has been taken. Reporter also mentioned the problem to the tower.

Original NASA ASRS Text

Title: FLC OF S80 HAS LOC DEFLECTION DURING APCH INTO TUL. THEY TRIED CHKING TO DETERMINE IF IT IS THE ACFT EQUIP. THEY DETERMINED THAT THIS IS HAPPENING TO OTHER ACFT AS WELL. ON ANOTHER TRIP WITH A COUPLED APCH THE SAME PROB EXISTED.

Narrative: TUL TWR. LOCATION: ON LOC APCH TO RWY 18L TUL. FROM 2000 FT AGL TO 700 FT AGL RWY 18L LOC, LOC DEFLECTION NOTICED ON AUTOFLT SYS AND ON NAV INSTS. AFTER AUTOPLT WAS DISCONNECTED, LOC WAS STILL ERRATIC. THIS PROB WAS CONFIRMED BY ANOTHER AIRLINE FLT FOLLOWING ON SAME APCH. RWY 18L HAS BEEN UNDER CONSTRUCTION, WHICH MAY HAVE AFFECTED LOC SIGNAL INTEGRITY. SUGGEST FURTHER FOLLOW UP AND ANALYSIS BY APPROPRIATE AUTHS. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR STATES THAT HE MADE ANOTHER TRIP INTO TUL AND HAD HOPED TO CHK THE LOC DEVS TO SEE IF THE CONDITIONS HAD CHANGED. IT WAS DIFFICULT BECAUSE THERE WAS SO MUCH WIND. THEY DID MAKE A COUPLED APCH ON RWY 18L ILS AND THERE WERE STILL DEVS. HE COULD SEE THE WORK GOING ON WITH THE APCH LIGHTS AND RPTR WONDERS IF THAT MAY BE CAUSING SOME OF THE PROBS. HE HAS LEARNED THAT THE EFFORTS ARE TO BRING RWY 18L UP TO A CAT II STATUS. THE COMPANY DOES KNOW ABOUT THE SIT BUT RPTR DOES NOT KNOW IF ANY ACTION HAS BEEN TAKEN. RPTR ALSO MENTIONED THE PROB TO THE TWR.

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.

Flight crew of S80 has localizer deflection during approach into tul. They tried checking to determine if it is the aircraft equipment. They determined that this is happening to other aircraft as well. On another trip with a coupled approach the same problem existed.