B737 flight crew and sct approach controller reported a low altitude alert issued during a period of...

Attributes
ACN	1548151
Time
Date	201806
Local Time Of Day	1201-1800
Place
Locale Reference	BUR.Airport
State Reference	CA
Environment
Light	Daylight
Aircraft 1
Make Model Name	B737 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	Descent
Route In Use	Vectors
Flight Plan	IFR
Person 1
Function	Captain Pilot Not Flying
Qualification	Flight Crew Instrument Flight Crew Air Transport Pilot (ATP) Flight Crew Multiengine
Experience	Flight Crew Type 11000
Person 2
Function	First Officer
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 605
Events
Anomaly	ATC Issue All Types Deviation - Altitude Excursion From Assigned Altitude Inflight Event / Encounter CFTT / CFIT

Narrative:

On descent into bur; I believe ATC issued us a descent to 4;000 feet. That's what my first officer and I understood; and that's what I believe I read back. We were making a slow descent to that altitude in VFR conditions over the mountains approximately 15 miles northwest of the airport when ATC said they had a low altitude alert on us and told us to climb to 5;000 feet. We did so. ATC asked us what we believed our issued clearance limit was and I told them 4;000 feet. They told us to maintain 5;000 feet and then issued the descent to 4;000 feet about five miles later. They never said anything else about the matter.

Original NASA ASRS Text

Title: B737 flight crew and SCT Approach Controller reported a low altitude alert issued during a period of increased traffic.

Narrative: On descent into BUR; I believe ATC issued us a descent to 4;000 feet. That's what my First Officer and I understood; and that's what I believe I read back. We were making a slow descent to that altitude in VFR conditions over the mountains approximately 15 miles northwest of the airport when ATC said they had a Low Altitude Alert on us and told us to climb to 5;000 feet. We did so. ATC asked us what we believed our issued clearance limit was and I told them 4;000 feet. They told us to maintain 5;000 feet and then issued the descent to 4;000 feet about five miles later. They never said anything else about the matter.

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 flight crew and sct approach controller reported a low altitude alert issued during a period of increased traffic.