<< >> NASA ASRS Report 1539325, May 2018

First officer reported an airborne conflict with what they perceived to be a weather balloon half a mile off right wing.

Attributes
ACN	1539325
Time
Date	201805
Local Time Of Day	1801-2400
Place
Locale Reference	SBGR.Airport
State Reference	FO
Environment
Flight Conditions	VMC
Aircraft 1
Make Model Name	Heavy Transport
Operating Under FAR Part	Part 121
Flight Phase	Climb
Flight Plan	IFR
Person 1
Function	First Officer Pilot Not Flying
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument Flight Crew Multiengine
Experience	Flight Crew Total 5962 Flight Crew Type 562
Events
Anomaly	Conflict Airborne Conflict Inflight Event / Encounter Object

Narrative:

First officer saw something and verbalized it. None of the crew could identify what it was initially. First officer had to turn to miss it. ATC did not tell us about it. As it passed less than 1/2 mile off the right wing; it looked like a partially deflated mylar weather balloon with a long string of dimly lit lights. We then told ATC we almost hit it. We also radioed back to departure airport operations and told them.

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Original NASA ASRS Text

Title: First Officer reported an airborne conflict with what they perceived to be a weather balloon half a mile off right wing.

Narrative: First Officer saw something and verbalized it. None of the crew could identify what it was initially. First Officer had to turn to miss it. ATC did not tell us about it. As it passed less than 1/2 mile off the right wing; it looked like a partially deflated Mylar weather balloon with a long string of dimly lit lights. We then told ATC we almost hit it. We also radioed back to departure airport operations and told them.

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.