B737-700 flight crew reported a track deviation occurred on the RNAV (rnp) Z approach to 20R in sna ...

Attributes
ACN	1575360
Time
Date	201809
Local Time Of Day	1201-1800
Place
Locale Reference	SNA.Airport
State Reference	CA
Environment
Flight Conditions	Mixed
Light	Daylight
Aircraft 1
Make Model Name	B737-700
Operating Under FAR Part	Part 121
Flight Phase	Initial Approach
Route In Use	STAR OHSEA 1
Flight Plan	IFR
Person 1
Function	Captain Pilot Not Flying
Qualification	Flight Crew Multiengine Flight Crew Instrument Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 215
Person 2
Function	Pilot Flying First Officer
Qualification	Flight Crew Multiengine Flight Crew Instrument Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 307 Flight Crew Type 1350
Events
Anomaly	Deviation - Procedural Published Material / Policy Deviation - Procedural Clearance Deviation - Track / Heading All Types

Narrative:

We were on the final portion of ohsea 1 arrival into sna and checked in with final controller; he did not assign an approach; visual or RNAV; since ILS was notamed out. I asked for the RNAV (rnp) Z runway 20R; and he said no problem. We were just a couple miles west of klevr fix which begins the RNAV. The controller cleared us for the requested approach and first officer (pilot flying) tried to close the discontinuity and add mnnie to continue the procedure. I was clearing outside and took quick glances as he could not close the discon. By the time I looked inside to check; socal asked if we were having trouble because we were not intercepting the track for the approach. This all happened in the matter of a minute it seemed. I then requested the visual approach to 20R instead. I told the first officer not to worry about why he couldn't close the discon at that point and we'd sort it out on the ground. We received two heading vectors to the final and the remainder of the approach was unremarkable. Before the controller switched us to the tower; he made the comment that he noticed several company flights had had the same problem at the same fix (klevr) as we showed. He said 'no problem; just curious' and switched us. And that's why we're submitting asaps! Discons happen from time to time; especially with rushed clearances and compression like we had. I could've maybe coordinated a little quicker with socal and asked for the visual to prevent the track divergence.

Original NASA ASRS Text

Title: B737-700 flight crew reported a track deviation occurred on the RNAV (RNP) Z Approach to 20R in SNA when the First Officer failed to close a discontinuity.

Narrative: We were on the final portion of OHSEA 1 Arrival into SNA and checked in with Final Controller; he did not assign an approach; visual or RNAV; since ILS was NOTAMed out. I asked for the RNAV (RNP) Z Runway 20R; and he said no problem. We were just a couple miles west of KLEVR fix which begins the RNAV. The controller cleared us for the requested approach and First Officer (Pilot Flying) tried to close the discontinuity and add MNNIE to continue the procedure. I was clearing outside and took quick glances as he could not close the DISCON. By the time I looked inside to check; SoCal asked if we were having trouble because we were not intercepting the track for the approach. This all happened in the matter of a minute it seemed. I then requested the visual approach to 20R instead. I told the First Officer not to worry about why he couldn't close the DISCON at that point and we'd sort it out on the ground. We received two heading vectors to the final and the remainder of the approach was unremarkable. Before the controller switched us to the Tower; he made the comment that he noticed several Company flights had had the same problem at the same fix (KLEVR) as we showed. He said 'no problem; just curious' and switched us. And that's why we're submitting ASAPs! DISCONs happen from time to time; especially with rushed clearances and compression like we had. I could've maybe coordinated a little quicker with SoCal and asked for the visual to prevent the track divergence.

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.

B737-700 flight crew reported a track deviation occurred on the RNAV (rnp) Z approach to 20R in sna when the first officer failed to close a discontinuity.