A pilot flying into a non towered airport reported a near midair collision with a departing aircraft...

Attributes
ACN	1676934
Time
Date	201908
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	PA-31 Navajo/Chieftan/Mojave/T1040
Operating Under FAR Part	Part 91
Flight Phase	Landing
Flight Plan	None
Aircraft 2
Make Model Name	Cessna Single Piston Undifferentiated or Other Model
Operating Under FAR Part	Part 91
Flight Phase	Initial Climb
Person 1
Function	Captain Single Pilot
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Flight Instructor Flight Crew Instrument Flight Crew Multiengine
Experience	Flight Crew Last 90 Days 100 Flight Crew Total 5100 Flight Crew Type 1900
Events
Anomaly	Conflict NMAC
Miss Distance	Horizontal 300 Vertical 300

Narrative:

Began position reporting 10 miles north of ZZZ and reported position at 5 miles and 1 mile from the airport. Upon hearing a slower aircraft on left crosswind I widened my pattern and slowed to stay outside this aircraft until I had it in sight. During this time another aircraft departed that I did not see or hear on the CTAF. Paths crossed with 300 feet separation. I didn't see this aircraft until someone on the frequency mentioned their position. It bothered me that despite vigilance and planning to avoid known traffic flows we came this close. Maneuvering space at this airport is compressed by its proximity to another airport and class C airspace. Ironically; this aircraft was being flown to this airport for avionics that would include traffic reporting capabilities.

Original NASA ASRS Text

Title: A pilot flying into a non towered airport reported a NMAC with a departing aircraft.

Narrative: Began position reporting 10 miles north of ZZZ and reported position at 5 miles and 1 mile from the airport. Upon hearing a slower aircraft on left crosswind I widened my pattern and slowed to stay outside this aircraft until I had it in sight. During this time another aircraft departed that I did not see or hear on the CTAF. Paths crossed with 300 feet separation. I didn't see this aircraft until someone on the frequency mentioned their position. It bothered me that despite vigilance and planning to avoid known traffic flows we came this close. Maneuvering space at this airport is compressed by its proximity to another airport and Class C airspace. Ironically; this aircraft was being flown to this airport for avionics that would include traffic reporting capabilities.

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.