DC8-73 crew had DME problems on the runway 25L ILS approach at lax.

Attributes
ACN	502690
Time
Date	200102
Day	Wed
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : lax.airport
State Reference	CA
Altitude	msl bound lower : 2200 msl bound upper : 10000
Environment
Flight Conditions	IMC
Light	Dawn
Aircraft 1
Controlling Facilities	tracon : sct.tracon
Operator	common carrier : air carrier
Make Model Name	DC-8 70
Operating Under FAR Part	Part 121
Navigation In Use	ils localizer & glide slope : 25l
Flight Phase	descent : approach
Route In Use	approach : instrument precision
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : cfi pilot : flight engineer pilot : multi engine
Experience	flight time last 90 days : 50 flight time total : 7050 flight time type : 1400
ASRS Report	502690
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : multi engine pilot : instrument pilot : commercial
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	other flight crewa other flight crewb
Resolutory Action	none taken : anomaly accepted
Consequence	other
Factors
Maintenance	performance deficiency : testing performance deficiency : repair performance deficiency : fault isolation
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

I have noticed many times when flying the ILS to runway 25L at lax in a DC8 aircraft that while on the approach between arnes and limma, the DME displays on captain's and first officer's side are intermittently unreliable, making it difficult to comply with the crossing restrs of this approach. When written up, aircraft system check out normal. It is my perception that this is a problem unique to this approach.

Original NASA ASRS Text

Title: DC8-73 CREW HAD DME PROBS ON THE RWY 25L ILS APCH AT LAX.

Narrative: I HAVE NOTICED MANY TIMES WHEN FLYING THE ILS TO RWY 25L AT LAX IN A DC8 ACFT THAT WHILE ON THE APCH BTWN ARNES AND LIMMA, THE DME DISPLAYS ON CAPT'S AND FO'S SIDE ARE INTERMITTENTLY UNRELIABLE, MAKING IT DIFFICULT TO COMPLY WITH THE XING RESTRS OF THIS APCH. WHEN WRITTEN UP, ACFT SYS CHK OUT NORMAL. IT IS MY PERCEPTION THAT THIS IS A PROB UNIQUE TO THIS APCH.

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.