Uav operator reported exceeding maxumum allowed altitude.

Attributes
ACN	1616421
Time
Date	201901
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	UAV - Unpiloted Aerial Vehicle
Operating Under FAR Part	Other 107
Flight Phase	Initial Climb
Person 1
Function	Pilot Flying Single Pilot
Qualification	Flight Crew Private
Experience	Flight Crew Last 90 Days 50 Flight Crew Total 66 Flight Crew Type 35
Events
Anomaly	Deviation - Altitude Overshoot Deviation - Procedural Clearance Deviation - Procedural FAR
Miss Distance	Vertical 89

Narrative:

Operating on a FAA approved flight plan in controlled airspace under authorization. The flight plan was filed for and approved by the FAA laanc uas [unmanned aerial vehicle] system. The flight plan was filed and approved in a 400 feet sector per the uas FAA facilities map. Pilot normally has lock on vertical altitude of 400 feet in third party app. When uas unlock was required due to airspace; the altitude restriction normally set in the app was deleted therefore causing pilot to inadvertently ascend through the 400 feet uas ceiling to an altitude of 489 feet for a period of 8 seconds and the altitude deviation was noticed. After descending immediately; I completed the photo mission and landed without incident. No property was damaged or injury of any kind happened during this altitude deviation. Two flights were flown during this mission. The first was a total flight time of 1:04 minutes and the second was 01:36 minutes.

Original NASA ASRS Text

Title: UAV operator reported exceeding maxumum allowed altitude.

Narrative: Operating on a FAA approved flight plan in controlled airspace under authorization. The flight plan was filed for and approved by the FAA LAANC UAS [Unmanned Aerial Vehicle] System. The flight plan was filed and approved in a 400 feet sector per the UAS FAA Facilities map. Pilot normally has lock on vertical altitude of 400 feet in third party app. When UAS unlock was required due to airspace; the altitude restriction normally set in the app was deleted therefore causing pilot to inadvertently ascend through the 400 feet UAS ceiling to an altitude of 489 feet for a period of 8 seconds and the altitude deviation was noticed. After descending immediately; I completed the photo mission and landed without incident. No property was damaged or injury of any kind happened during this altitude deviation. Two flights were flown during this mission. The first was a total flight time of 1:04 Minutes and the second was 01:36 minutes.

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.