B737 captain reports his first officer descending below glide slope during an ILS approach in VMC. T...

Narrative:

Visual approach to runway 30 which has a displaced threshold of 1;443 ft. The first officer was flying. He had done a RNAV approach with no problems and right on the glide path on the previous leg. He started this approach and flew the glide slope till about 400 ft. Then he started to go lower on the glide slope. I called 1/2 a dot low then 1 dot low. The PAPI lights had gone now to 3 red and one white I told him get back to the glide slope. He told me he was visual! I told him again to get back to the glide slope. He added power and got to between 1 dot to half a dot low. We cleared the runway displaced threshold at touch down. When we turned off I stopped the aircraft and I told him don't ever do that again! He now agreed. This type of approach activity is derived from the FAA and airline concept that the crew is responsible for clearance with terrain on a visual approach. Whenever you go below the glide slope or glide path in a transport category aircraft you open your self up for an accident. This should be changed in part 121 that you never go below a glide slope; glide path; PAPI; or VASI lights on any visual approach. I have lost this argument in the past as the airline and the FAA will just shrug and brush it off.

Original NASA ASRS Text

Title: B737 Captain reports his First Officer descending below glide slope during an ILS approach in VMC. The First Officer is instructed to get back on the glide slope and lands safely beyond the displaced threshold.

Narrative: Visual approach to Runway 30 which has a displaced threshold of 1;443 FT. The First Officer was flying. He had done a RNAV approach with no problems and right on the glide path on the previous leg. He started this approach and flew the glide slope till about 400 FT. Then he started to go lower on the glide slope. I called 1/2 a dot low then 1 dot low. The PAPI lights had gone now to 3 red and one white I told him get back to the glide slope. He told me he was visual! I told him again to get back to the glide slope. He added power and got to between 1 dot to half a dot low. We cleared the runway displaced threshold at touch down. When we turned off I stopped the aircraft and I told him don't ever do that again! He now agreed. This type of approach activity is derived from the FAA and airline concept that the crew is responsible for clearance with terrain on a visual approach. Whenever you go below the glide slope or glide path in a transport category aircraft you open your self up for an accident. This should be changed in Part 121 that you never go below a glide slope; glide path; PAPI; or VASI lights on any visual approach. I have lost this argument in the past as the airline and the FAA will just shrug and brush it off.

Data retrieved from NASA's ASRS site as of April 2012 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	921899
Time
Date	201011
Local Time Of Day	1201-1800
Place
Locale Reference	MIA.Airport
State Reference	FL
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	B737-800
Operating Under FAR Part	Part 121
Flight Phase	Final Approach
Route In Use	Visual Approach
Flight Plan	IFR
Person 1
Function	Captain Pilot Not Flying
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Flight Engineer Flight Crew Instrument Flight Crew Multiengine
Experience	Flight Crew Last 90 Days 210 Flight Crew Total 15800 Flight Crew Type 420
Events
Anomaly	Deviation - Procedural Published Material / Policy

B737 captain reports his first officer descending below glide slope during an ILS approach in VMC. The first officer is instructed to get back on the glide slope and lands safely beyond the displaced threshold.