Crj-700 flight crew did not initially detect that the RNAV prm runway 10R approach to ord did not li...

Attributes
ACN	1422721
Time
Date	201702
Local Time Of Day	1201-1800
Place
Locale Reference	ORD.Airport
State Reference	IL
Environment
Light	Dusk
Aircraft 1
Make Model Name	Regional Jet 700 ER/LR (CRJ700)
Operating Under FAR Part	Part 121
Flight Phase	Initial Approach
Route In Use	Other RNAV PRM Runway 10R
Flight Plan	IFR
Person 1
Function	Pilot Flying Captain
Qualification	Flight Crew Air Transport Pilot (ATP)
Person 2
Function	Pilot Not Flying First Officer
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Deviation - Procedural Published Material / Policy

Narrative:

Ord was in east flow and the ATIS was advertising RNAV prm 10R. The prevailing ceilings were approximately 1000 AGL. While reviewing and briefing the approach; we both missed 'LNAV' minimums weren't shown on the prm approach plate. Only 'LNAV/VNAV' was published on the prm plate. We both missed this and used the 'LNAV/VNAV' minimums. Per company procedure; we rounded the minimums up to the nearest hundred feet. The rounded minimums were the same for 'LNAV' on the regular plate as they were for 'LNAV/VNAV' on the prm plate. We realized the mistake during post flight.RNAV approaches are rarely done during line flying. Although since the introduction of prm approaches in to ord; specifically to runway 10R which has been done before may have been contributing factors. We should have been more alert to the unusual approach and reacted accordingly.

Original NASA ASRS Text

Title: CRJ-700 flight crew did not initially detect that the RNAV PRM Runway 10R Approach to ORD did not list LNAV only minimums; only LNAV/VNAV minimums. The aircraft was capable of LNAV only.

Narrative: ORD was in east flow and the ATIS was advertising RNAV PRM 10R. The prevailing ceilings were approximately 1000 AGL. While reviewing and briefing the approach; we both missed 'LNAV' minimums weren't shown on the PRM approach plate. Only 'LNAV/VNAV' was published on the PRM plate. We both missed this and used the 'LNAV/VNAV' minimums. Per company procedure; we rounded the minimums up to the nearest hundred feet. The rounded minimums were the same for 'LNAV' on the regular plate as they were for 'LNAV/VNAV' on the PRM plate. We realized the mistake during post flight.RNAV approaches are rarely done during line flying. Although since the introduction of PRM approaches in to ORD; specifically to runway 10R which has been done before may have been contributing factors. We should have been more alert to the unusual approach and reacted accordingly.

Data retrieved from NASA's ASRS site 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.

Crj-700 flight crew did not initially detect that the RNAV prm runway 10R approach to ord did not list LNAV only minimums; only LNAV/VNAV minimums. The aircraft was capable of LNAV only.