A B727 captain was flying near mlp and reported that his first officer provided the wrong outbound course causing him to join J-36 rather than the assigned J-136.

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Attributes
ACN	464930
Time
Date	200003
Day	Thu
Local Time Of Day	1801 To 2400
Place
State Reference	ID
Altitude	msl bound lower : 27000 msl bound upper : 28000
Environment
Flight Conditions	Mixed
Light	Night
Aircraft 1
Controlling Facilities	artcc : zlc.artcc
Operator	common carrier : air carrier
Make Model Name	B727 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	climbout : vacating altitude
Route In Use	enroute airway : j36.airway
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : multi engine pilot : commercial pilot : instrument
Experience	flight time last 90 days : 100 flight time total : 10000 flight time type : 240
ASRS Report	464930
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial pilot : multi engine
Events
Anomaly	non adherence : company policies non adherence : clearance non adherence : far non adherence : published procedure other anomaly other other spatial deviation
Independent Detector	other controllera
Resolutory Action	controller : issued advisory flight crew : returned to original clearance
Consequence	faa : reviewed incident with flight crew other
Supplementary
Problem Areas	Chart Or Publication Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Initially cleared via J-136 en route from geg to mem during the climb to FL290, and after passing mlp, we inadvertently intercepted J-36 outbound rather than J-136. ZLC questioned our route of flight, at which time we recognized the error which we had made, and immediately corrected and intercepted J-136. The first officer erroneously provided the outbound course to the captain, who was flying the aircraft. The captain did not immediately verify the outbound course for the airway, which he normally does. Additionally, the close proximity of the 2 airways, and the similar number designation (J-36 and J-136), along with reduced cockpit illumination during night operations, were contributing factors. Thanks again to ARTCC. We did question the controller as to any problems we may have caused, and he replied in the negative.

Original NASA ASRS Text

Title: A B727 CAPT WAS FLYING NEAR MLP AND RPTED THAT HIS FO PROVIDED THE WRONG OUTBOUND COURSE CAUSING HIM TO JOIN J-36 RATHER THAN THE ASSIGNED J-136.

Narrative: INITIALLY CLRED VIA J-136 ENRTE FROM GEG TO MEM DURING THE CLB TO FL290, AND AFTER PASSING MLP, WE INADVERTENTLY INTERCEPTED J-36 OUTBOUND RATHER THAN J-136. ZLC QUESTIONED OUR RTE OF FLT, AT WHICH TIME WE RECOGNIZED THE ERROR WHICH WE HAD MADE, AND IMMEDIATELY CORRECTED AND INTERCEPTED J-136. THE FO ERRONEOUSLY PROVIDED THE OUTBOUND COURSE TO THE CAPT, WHO WAS FLYING THE ACFT. THE CAPT DID NOT IMMEDIATELY VERIFY THE OUTBOUND COURSE FOR THE AIRWAY, WHICH HE NORMALLY DOES. ADDITIONALLY, THE CLOSE PROX OF THE 2 AIRWAYS, AND THE SIMILAR NUMBER DESIGNATION (J-36 AND J-136), ALONG WITH REDUCED COCKPIT ILLUMINATION DURING NIGHT OPS, WERE CONTRIBUTING FACTORS. THANKS AGAIN TO ARTCC. WE DID QUESTION THE CTLR AS TO ANY PROBS WE MAY HAVE CAUSED, AND HE REPLIED IN THE NEGATIVE.

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.