An air carrier captain on the fwa RNAV 23 was confused by the commercial chart note 2 which constrai...

Narrative:

The flight was assigned the RNAV 23 approach to runway 23 into fwa. The commercial plate has an ambiguous note. The black circle 2 note on the 12-3 plate states 1;520 ft applies to LNAV only approaches but it is not possible to ascertain exactly how it applies to the LNAV only approaches. The nos charts show that there is a level off at 1;520 ft between akews and babac and that level off is not depicted clearly on the commercial chart. One could assume from the commercial chart that 1;520 ft is required but is not clear which point to which point that altitude would apply. The commercial plate should be revised to clearly denote 1;520 ft is a level off altitude between akews and babac for LNAV only approaches as well as the MDA of 1;300 ft after babac.

Original NASA ASRS Text

Title: An air carrier Captain on the FWA RNAV 23 was confused by the Commercial Chart Note 2 which constrains a descent at BABAC to 1;500 FT when using the Auburn altimeter setting but does not clearly indicate what the descent minimum is after BABAC.

Narrative: The flight was assigned the RNAV 23 approach to Runway 23 into FWA. The Commercial Plate has an ambiguous note. The black circle 2 note on the 12-3 plate states 1;520 FT applies to LNAV only approaches but it is not possible to ascertain exactly how it applies to the LNAV only approaches. The NOS charts show that there is a level off at 1;520 FT between AKEWS and BABAC and that level off is not depicted clearly on the Commercial Chart. One could assume from the Commercial Chart that 1;520 FT is required but is not clear which point to which point that altitude would apply. The Commercial Plate should be revised to clearly denote 1;520 FT is a level off altitude between AKEWS and BABAC for LNAV only approaches as well as the MDA of 1;300 FT after BABAC.

Data retrieved from NASA's ASRS site as of July 2013 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.

Attributes
ACN	1105680
Time
Date	201307
Local Time Of Day	1201-1800
Place
Locale Reference	FWA.Airport
State Reference	IN
Environment
Light	Daylight
Aircraft 1
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	Initial Approach
Route In Use	Other RNAV Runway 23
Flight Plan	IFR
Person 1
Function	Captain
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Deviation - Procedural Clearance Deviation - Procedural Published Material / Policy

An air carrier captain on the fwa RNAV 23 was confused by the commercial chart note 2 which constrains a descent at babac to 1;500 ft when using the auburn altimeter setting but does not clearly indicate what the descent minimum is after babac.