Mooney M20T pilot has a track-heading and altitude deviation during approach to mmu.

Attributes
ACN	719112
Time
Date	200611
Local Time Of Day	1201 To 1800
Place
Locale Reference	intersection : hokir
State Reference	NY
Altitude	msl single value : 1500
Environment
Flight Conditions	IMC
Light	Night
Aircraft 1
Controlling Facilities	tracon : n90.tracon tower : zzz.tower
Operator	general aviation : personal
Make Model Name	M-20 Series Undifferentiated or Other Model
Operating Under FAR Part	Part 91
Flight Phase	descent : approach landing : go around landing : missed approach
Flight Plan	IFR
Person 1
Affiliation	other
Function	flight crew : single pilot
Qualification	pilot : instrument pilot : private
Experience	flight time last 90 days : 65 flight time total : 2200 flight time type : 2050
ASRS Report	719112
Person 2
Affiliation	government : faa
Function	controller : approach controller : radar
Events
Anomaly	altitude deviation : excursion from assigned altitude other spatial deviation
Independent Detector	other controllera
Resolutory Action	controller : provided flight assist
Supplementary
Problem Areas	Chart Or Publication Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance

Narrative:

1) expected ILS runway 23 approach as a result of monitoring the WX along route jyo-mmu. 2) ny approach control advised clearance to if hokir for GPS runway 5. 3) I selected the first commercial approach plate available for GPS runway 5 which was NDB GPS runway 5 and looked for if hokir. 4) if hokir is not depicted on the NDB GPS runway 5 so I asked the controller for the spelling of hokir. 5) in the process of inputting hokir into the aircraft's GPS for the approach and attempting to resolve the situation I had a temporary loss of situational awareness. 6) mmu tower then advised a heading of 220 degrees and turned me over to ny approach control for vectors back to if hokir. 7) the events included descent below depicted altitude and temporary loss of situational awareness. 8) subsequent vectors and approach resulted in a safe landing at mmu. The issues contributing to the problems encountered include the inconsistency of the NDB (GPS) runway 5 and the RNAV (GPS) runway 5 approach plates; ie; hokir is depicted on the RNAV (GPS) runway 5 approach plate and not on the NDB (GPS) runway 5 approach plate. As well the workload could have been reduced with greater familiarity with the GPS equipment capabilities. Resolution of the approach plate inconsistency; ie; depiction of if hokir on both approach plates and better knowledge and training for the GPS equipment capabilities.

Original NASA ASRS Text

Title: MOONEY M20T PLT HAS A TRACK-HDG AND ALTDEV DURING APCH TO MMU.

Narrative: 1) EXPECTED ILS RWY 23 APCH AS A RESULT OF MONITORING THE WX ALONG RTE JYO-MMU. 2) NY APCH CTL ADVISED CLRNC TO IF HOKIR FOR GPS RWY 5. 3) I SELECTED THE FIRST COMMERCIAL APCH PLATE AVAILABLE FOR GPS RWY 5 WHICH WAS NDB GPS RWY 5 AND LOOKED FOR IF HOKIR. 4) IF HOKIR IS NOT DEPICTED ON THE NDB GPS RWY 5 SO I ASKED THE CTLR FOR THE SPELLING OF HOKIR. 5) IN THE PROCESS OF INPUTTING HOKIR INTO THE ACFT'S GPS FOR THE APCH AND ATTEMPTING TO RESOLVE THE SIT I HAD A TEMPORARY LOSS OF SITUATIONAL AWARENESS. 6) MMU TWR THEN ADVISED A HDG OF 220 DEGS AND TURNED ME OVER TO NY APCH CTL FOR VECTORS BACK TO IF HOKIR. 7) THE EVENTS INCLUDED DSCNT BELOW DEPICTED ALT AND TEMPORARY LOSS OF SITUATIONAL AWARENESS. 8) SUBSEQUENT VECTORS AND APCH RESULTED IN A SAFE LNDG AT MMU. THE ISSUES CONTRIBUTING TO THE PROBS ENCOUNTERED INCLUDE THE INCONSISTENCY OF THE NDB (GPS) RWY 5 AND THE RNAV (GPS) RWY 5 APCH PLATES; IE; HOKIR IS DEPICTED ON THE RNAV (GPS) RWY 5 APCH PLATE AND NOT ON THE NDB (GPS) RWY 5 APCH PLATE. AS WELL THE WORKLOAD COULD HAVE BEEN REDUCED WITH GREATER FAMILIARITY WITH THE GPS EQUIP CAPABILITIES. RESOLUTION OF THE APCH PLATE INCONSISTENCY; IE; DEPICTION OF IF HOKIR ON BOTH APCH PLATES AND BETTER KNOWLEDGE AND TRAINING FOR THE GPS EQUIP CAPABILITIES.

Data retrieved from NASA's ASRS site as of January 2009 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.