Air carrier pilot flying the lda X runway 8 at jnu reports descending below the 5;600 foot MEA on th...

Attributes
ACN	1196694
Time
Date	201408
Local Time Of Day	0601-1200
Place
Locale Reference	JNU.Airport
State Reference	AK
Environment
Flight Conditions	VMC
Aircraft 1
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	Initial Approach
Flight Plan	IFR
Component
Aircraft Component	Altitude Hold/Capture
Person 1
Function	Captain
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Aircraft Equipment Problem Less Severe Deviation - Altitude Overshoot Deviation - Procedural Clearance

Narrative:

Following a missed approach to juneau airport; we were executing a second lda Z [X] runway 8 approach into juneau; via the ssr VOR transition. The flight was operating in VMC on top of a cloud layer. After leveling at 7;000 feet; a descent was initiated between ssr VOR and lynns to 5;600 feet; by selecting 5;600 in the altitude alerter and selecting vertical speed mode on the afcs. The altitude alerter did not chime; and the plane continued in a descent through 5;600 feet. Both pilots were momentarily looking outside; and when I glanced back inside to scan the altimeter; the plane was descending through 4;900 feet. I immediately responded by bringing the power levers to climb power and selecting a climb mode on the afcs to return the plane to 5;600 feet. The flight remained in VMC during the altitude deviation.

Original NASA ASRS Text

Title: Air carrier pilot flying the LDA X Runway 8 at JNU reports descending below the 5;600 foot MEA on the SSR 007 degree radial after setting 5;600 in the MCP and initiating a vertical speed descent. No chime was heard and the deviation was not noted until 4;900 feet and corrected.

Narrative: Following a missed approach to Juneau Airport; we were executing a second LDA Z [X] Runway 8 approach into Juneau; via the SSR VOR transition. The flight was operating in VMC on top of a cloud layer. After leveling at 7;000 feet; a descent was initiated between SSR VOR and LYNNS to 5;600 feet; by selecting 5;600 in the altitude alerter and selecting vertical speed mode on the AFCS. The altitude alerter did not chime; and the plane continued in a descent through 5;600 feet. Both pilots were momentarily looking outside; and when I glanced back inside to scan the altimeter; the plane was descending through 4;900 feet. I immediately responded by bringing the power levers to climb power and selecting a climb mode on the AFCS to return the plane to 5;600 feet. The flight remained in VMC during the altitude deviation.

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.

Air carrier pilot flying the lda X runway 8 at jnu reports descending below the 5;600 foot MEA on the ssr 007 degree radial after setting 5;600 in the MCP and initiating a vertical speed descent. No chime was heard and the deviation was not noted until 4;900 feet and corrected.